OFFSHORE ENERGY DEVELOPMENT CORP
8-K, 1997-01-27
CRUDE PETROLEUM & NATURAL GAS
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                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549

                                   FORM 8-K

                                CURRENT REPORT

                      Pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934

    Date of Report (Date of earliest event reported):    DECEMBER 31, 1996

                    OFFSHORE ENERGY DEVELOPMENT CORPORATION
            (Exact name of registrant as specified in its charter)

         DELAWARE                    0-21663                  76-0509791
(State or other jurisdiction       (Commission               (IRS Employer
     of incorporation)            File Number)            Identification No.)

      1400 WOODLOCH FOREST DRIVE, SUITE 200
            THE WOODLANDS, TEXAS                        77380
    (Address of principal executive offices)          (Zip code)

      Registrant's telephone number, including area code:  (281) 364-0033

                                    -1-
<PAGE>

ITEM 5   OTHER EVENTS.

      Effective December 31, 1996, Dauphin Island Gathering Partners, a Texas
general partnership ("DIGP"), which owns the Dauphin Island Gathering System
(the "DIGS"), merged (the "Merger") with Main Pass Gas Gathering Company, a
Delaware general partnership ("MPGGC"), which owned the Main Pass Gas Gathering
System (the "MPGGS"). DIGP was the surviving entity of the merger, and the
former partners of MPGGC were admitted as partners in DIGP. Offshore Energy
Development Corporation, a Delaware corporation (the "Company"), developed and,
as the managing partner of DIGP, has operated the DIGS. The Company continues to
be the operator of the combined systems, and its monthly management fee has
increased from $55,000 to $62,500.

     The DIGS is located in the Mobile and northern Viosca Knoll Areas of the
Gulf of Mexico, offshore Alabama. The existing approximately 90-mile pipeline is
designed to gather over 350 million cubic feet per day (MMcf/d) of natural gas.
The MPGGS is located in the Main Pass Area East, offshore Louisiana, and the
southern Viosca Knoll Area, offshore Alabama, and consists of approximately 57
miles of pipeline designed to gather approximately 300 MMcf/d.

     The partners in DIGP have approved expansion plans to construct
approximately 78 miles of 24-inch diameter gas gathering line, which will
provide an additional 500 MMcf/d of capacity for a total combined capacity of
the DIGS and the MPGGS of approximately 1,150 MMcf/d. The expansion also will
provide a separate system for delivering wet gas (i.e., including gas liquids)
onshore to the previously announced natural gas liquids processing plant
proposed to be constructed by a partnership formed by the Company and its
partners in DIGP. The expansion will be installed in two phases. The initial
phase of the expansion is expected to enable the utilization of approximately
200 MMcf/d of unused capacity by the end of the third quarter of 1997. The
second phase, which will add approximately 500 MMcf/d of capacity, is expected
to be completed during the winter of 1997-98.

      Prior to the Merger, the Company held a 1% general partnership in DIGP
that would increase to a 15% interest when the other partners in DIGP received
the return of their investment plus a 10% rate of return. To avoid dilution of
its 1% interest upon admittance to DIGP of the former MPGGC partners,
the Company has purchased from one of its DIGP
partners for approximately $619,000 sufficient interest to maintain its 1%
interest. As a result of the Merger, however, the Company's interest will
increase to 11.15% when the partners in DIGP, including the former partners of
MPGGC, receive the return of their investment plus a 10% rate of return.
Although the Company's potential ownership interest in DIGP is less following
the Merger, it represents an interest in a much larger gathering system.

     In connection with the Merger, certain provisions of the DIGP partnership
agreement which precluded the increase in the Company's interest if the Company
experienced a change of control (as defined) or if the company were removed as
system operator have been eliminated.

                                    -2-
<PAGE>
ITEM 7    FINANCIAL STATEMENTS AND EXHIBITS.

      (c)   Exhibits.

            The following are filed as exhibits to this Current Report on Form
8-K.

Exhibit
NUMBER            DESCRIPTION

    99.1                Partnership Contribution Agreement dated December 13,
                        1996 by and among Dauphin Island Gathering Partners,
                        Dauphin Island Gathering Company, L.P., MCNIC Mobile Bay
                        Gathering Company, PanEnergy Dauphin Island Company, CNG
                        Main Pass Gas Gathering Corporation, Centana Gathering
                        Company, Coastal Dauphin Island Company, L.L.C. and Main
                        Pass Gas Gathering Company.

    99.2                Fifth Amended and Restated General Partnership Agreement
                        for Dauphin Island Gathering Partners dated as of
                        December 31, 1996 between MCNIC Mobile Bay Gathering
                        Company, Dauphin Island Gathering Company, L.P.,
                        PanEnergy Dauphin Island Company, Centana Gathering
                        Company, CNG Main Pass Gas Gathering Corporation and
                        Coastal Dauphin Island Company, L.L.C.

                                       -3-
<PAGE>
                               S I G N A T U R E

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                     OFFSHORE ENERGY DEVELOPMENT CORPORATION



Date: January  27, 1997 By:     /S/ MATTHEW T. BRADSHAW
                                    Matthew T. Bradshaw
                                    Vice President

                                    -4-
<PAGE>
                                 EXHIBIT INDEX

Exhibit
NUMBER            DESCRIPTION

    99.1                Partnership Contribution Agreement dated December 13,
                        1996 by and among Dauphin Island Gathering Partners,
                        Dauphin Island Gathering Company, L.P., MCNIC Mobile Bay
                        Gathering Company, PanEnergy Dauphin Island Company, CNG
                        Main Pass Gas Gathering Corporation, Centana Gathering
                        Company, Coastal Dauphin Island Company, L.L.C. and Main
                        Pass Gas Gathering Company.

    99.2                Fifth Amended and Restated General Partnership Agreement
                        for Dauphin Island Gathering Partners dated as of
                        December 31, 1996 between MCNIC Mobile Bay Gathering
                        Company, Dauphin Island Gathering Company, L.P.,
                        PanEnergy Dauphin Island Company, Centana Gathering
                        Company, CNG Main Pass Gas Gathering Corporation and
                        Coastal Dauphin Island Company, L.L.C.

                                    -5-


                                                                    EXHIBIT 99.1

                       PARTNERSHIP CONTRIBUTION AGREEMENT


                                  BY AND AMONG


                       DAUPHIN ISLAND GATHERING PARTNERS,
                          A TEXAS GENERAL PARTNERSHIP,

                     DAUPHIN ISLAND GATHERING COMPANY, L.P.,
                          A TEXAS LIMITED PARTNERSHIP,

                       MCNIC MOBILE BAY GATHERING COMPANY,
                             A MICHIGAN CORPORATION,

                        PANENERGY DAUPHIN ISLAND COMPANY,
                             A DELAWARE CORPORATION,

                    CNG MAIN PASS GAS GATHERING CORPORATION,
                             A DELAWARE CORPORATION,

                           CENTANA GATHERING COMPANY,
                             A DELAWARE CORPORATION,

                     COASTAL DAUPHIN ISLAND COMPANY, L.L.C.,
                      A DELAWARE LIMITED LIABILITY COMPANY,

                                       AND

                         MAIN PASS GAS GATHERING COMPANY
                         A DELAWARE GENERAL PARTNERSHIP


                             DATED DECEMBER 13, 1996

- ------------------------------------------------------------------------------
<PAGE>
                       PARTNERSHIP CONTRIBUTION AGREEMENT


      THIS PARTNERSHIP CONTRIBUTION AGREEMENT (this "AGREEMENT"), dated December
___, 1996, by and among Dauphin Island Gathering Partners, a Texas general
partnership (the "PARTNERSHIP"), Dauphin Island Gathering Company, L.P., a Texas
limited partnership ("DIGC") (the general partner of which is OEDC, Inc.), MCNIC
Mobile Bay Gathering Company, a Michigan corporation ("MMBGC"), PanEnergy
Dauphin Island Company, a Delaware corporation ("PDI" and, together with DIGC
and MMBGC, the "ORIGINAL PARTNERS"), CNG Main Pass Gas Gathering Corporation, a
Delaware corporation ("CNG"), Centana Gathering Company, a Delaware corporation
("CENTANA"), Coastal Dauphin Island Company, L.L.C., a Delaware corporation
("COASTAL" and, together with CNG and Centana, the "NEW PARTNERS" and, together
with the Original Partners, the "PARTNERS") and, Main Pass Gas Gathering
Company, a Delaware general partnership ("MPGC").


                              W I T N E S S E T H:


      WHEREAS, DIGC, MMBGC and PDI are parties to the Fourth Amended and
Restated General Partnership Agreement (the "FOURTH RESTATED PARTNERSHIP
AGREEMENT"), dated as of July 1, 1996, which governs the Partnership; and


      WHEREAS, the New Partners desire to cause MPGC to contribute its assets,
properties and rights, other than certain excluded assets, to the "Reconstituted
Partnership" (hereinafter defined) in exchange for certain general partnership
interests in the Reconstituted Partnership (the "PURCHASED INTEREST") and the
assumption by the Reconstituted Partnership of the obligation to perform certain
post-closing obligations of MPGC, all upon the terms and subject to the
conditions set forth below; and


      WHEREAS, MPGC desires to assign the general partnership interests in the
Reconstituted Partnership (or the right to receive same) to the New Partners
simultaneous with, or prior to, Closing; and


      WHEREAS,  MPGC  is  engaged  in  the  Main  Pass  Business  (hereinafter
defined); and


      WHEREAS, the Original Partners desire to reconstitute the Partnership to
admit the New Partners into the Reconstituted Partnership in exchange for
contribution of such assets, properties and rights of MPGC and the other
agreements of the New Partners contained herein, and to reconstitute the
Partnership (as reconstituted, the "RECONSTITUTED PARTNERSHIP") in accordance
with the Fifth Amended and Restated General Partnership Agreement attached as
EXHIBIT C (the "FIFTH RESTATED PARTNERSHIP AGREEMENT"), all upon the terms and
subject to the conditions set forth below; and


      WHEREAS, the Partners desire to effect the transactions described herein
as a merger of Main Pass Gas Gathering Company into the Partnership, with the
Partnership treated as continuing pursuant to Treasury Regulation Section
1.708-1(b)(2)(i).


      NOW, THEREFORE, in consideration of the foregoing and other consideration
described herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:
<PAGE>
                             ARTICLE I. DEFINITIONS


      1.1    DEFINITIONS.  As  used  herein,  the  following  terms  have  the
indicated meanings:


             "ACTION":  action,  suit,  investigation or proceeding before any
Governmental Authority.


             "ASSUMED MPGC  OBLIGATIONS":  all  obligations  of MPGC under the
Main Pass  Agreements  that accrue after or relate to events  occurring  after
the Effective Date.


             "CODE": the Internal Revenue Code of 1986, as amended from time to
time, and the regulations promulgated and rulings issued thereunder. Section
references to the Code are to the Code as in effect at the date of this
Agreement and any subsequent provisions of the Code amendatory thereof,
supplemental thereto or substituted therefor.


             "CONTRACT":  any  note,  bond,  mortgage,   indenture,   license,
franchise, permit, lease, agreement, contract, other instrument or obligation.


             "DAMAGES": losses, costs, expenses, fines, penalties, payments,
damages or other Liabilities including reasonable counsel fees and reasonable
investigation expenses from defending and prosecuting Actions.


             "DIGP RETAINED OBLIGATIONS": all accounts payable and contractual
amounts payable to third parties relating to the ownership or operation of the
DIGP Assets or DIGP Business on or prior to the Effective Date, except those
related to the VK 121 and 124 Extension and the Phase I Extension.


             "DIGS":   the   Dauphin   Island   Gathering   System   as   more
particularly described in the Fifth Restated Partnership Agreement.


             "DIGS ASSETS": means all of the assets, properties and rights that
comprise the DIGS, including the Contracts described in Exhibit A-1 to the Fifth
Restated Partnership Agreement, other than the DIGS Excluded Assets.


             "DIGS  BUSINESS":  means the business of owning and operating the
DIGS Assets.


             "DIGS EXCLUDED ASSETS": (i) all accounts, accounts receivable,
cash, cash equivalents, proceeds, revenues and prepaid expenses attributable to
the assets, properties, and rights of the Partnership with respect to any period
prior to the Effective Date; (ii) information or data that cannot be disclosed
to the New Partners as a result of confidentiality agreements 


                                       2
<PAGE>
that have been disclosed in writing by the Partnership to the New Partners;
(iii) all documents and instruments that may be protected by an attorney-client
privilege relating to claims or obligations for which the New Partners have not
assumed liability that, upon written advice of counsel, cannot be disclosed to
the New Partners without waiving the attorney-client privilege, and (iv) with
respect to periods of time prior to the Effective Date, all claims for
reimbursements or payments arising under or with respect to the Contracts
described in Exhibit A-1 to the Fifth Restated Partnership Agreement, provided,
however, no Action may be asserted with respect to such claims without Majority
Approval of the Management Committee.


             "ENCUMBRANCES": encumbrances, security interests, options, rights
of first refusal, easements, mortgages, charges, debentures, indentures, deeds
of trust, rights-of-way, restrictions, agreements, encroachments, licenses,
leases, permits, security agreements, or any other Encumbrances and other
restrictions or limitations on use of real or personal property or
irregularities in title thereto, in each case, that would have a Material
Adverse Effect.

             "ENVIRONMENTAL  CONTAMINANT":  any pollutant, waste, contaminant,
or hazardous,  extremely hazardous, or toxic material,  substance, chemical or
waste identified or defined as such under any Environmental Law.

             "ENVIRONMENTAL LAWS": all laws, rules, regulations, ordinances,
orders, decisions and decrees of all governmental authorities existing on the
date hereof that regulate the environmental impact of the DIGS Assets and Main
Pass Assets.

             "GOVERNMENTAL AUTHORITY": shall mean governmental and regulatory
authorities (including courts) having jurisdiction over any part to this
Agreement, the parties hereto, the assets of the Reconstituted Partnership or
the operation or services thereof.


             "HSR   ACT":   shall   mean   the   Hart-Scott-Rodino   Antitrust
Improvements  Act  of  1976,  as  amended,   and  the  rules  and  regulations
promulgated thereunder.


             "KNOWLEDGE": in the phrase "to its knowledge," or in "the best of
its knowledge" or a similar phrase, when used to qualify a representation of a
party, shall be deemed to be that knowledge held by the officers, directors, and
managers of the party (or its general partner or other Person controlling such
party) making the representation, including those officers or managers having
authority over or responsibility for the subject matter of the representation,
at the time such representation is made.


             "LAW": any statute,  ordinance,  rule, law (including common law)
or regulation promulgated by a Governmental Authority.


             "LIABILITY": means, with respect to any Person, any liability or
obligation of such Person of any kind, character or description, whether known
or unknown, absolute or contingent, direct or indirect, accrued or unaccrued,
liquidated or unliquidated, secured or unsecured, joint or several, due under a
guarantee of another Person's Liability, due or to 

                                       3
<PAGE>
become due, vested or unvested, executory, determined, determinable or otherwise
and whether or not the same is required to be accrued on such Person's financial
statements.


             "MAIN PASS  AGREEMENTS":  those  certain  natural  gas  gathering
Contracts,  project  Contracts,  platform space  Contracts and other Contracts
described on SCHEDULE 4.5.


             "MAIN  PASS  ASSETS"  or  "MPGC  ASSETS":   the  assets  of  MPGC
described on Schedule 4.13  and the Main Pass Agreements,  other than the Main
Pass Excluded Assets.


             "MAIN  PASS   BUSINESS":   means  the   business  of  owning  and
operating the Main Pass Assets.


             "MAIN PASS EXCLUDED ASSETS": (i) all accounts, accounts receivable,
cash, cash equivalents, proceeds, revenues and prepaid expenses attributable to
the assets, properties, and rights of MPGC with respect to any period prior to
the Effective Date; (ii) information or data that cannot be disclosed to the
Partnership as a result of confidentiality agreements that have been disclosed
in writing by MPGC to the Partnership; (iii) all documents and instruments that
may be protected by an attorney-client privilege relating to claims or
obligations not assumed by the Reconstituted Partnership that, upon written
advice of counsel, cannot be disclosed to the Reconstituted Partnership without
waiving the attorney-client privilege, and (iv) with respect to periods of time
prior to the Effective Date, all claims for reimbursements or payments arising
under or with respect to the Main Pass Agreements; provided, however, no Action
may be asserted with respect to such claims without Majority Approval of the
Management Committee.


             "MAIN PASS RECORDS": all of the applicable MPGC files, records and
data directly relating to the Main Pass Assets, Main Pass Business or Main Pass
Rights, including, without limitation, drawings, designs, technical information,
billings and check receipts, third party disbursement records and ad valorem
taxes; except for those relating to the Main Pass Excluded Assets.


             "MAIN PASS RIGHTS": all permits, franchises, licenses or other
rights owned by or for MPGC relating to the ownership or operation of the MPGS,
other than those relating to the Main Pass Excluded Assets.


             "MAIN PASS RETAINED OBLIGATIONS": all accounts payable and
contractual amounts owed to third parties by MPGC relating to the ownership or
operation of the Main Pass Assets or Main Pass Business on or prior to the
Effective Date, except those related to the Main Pass Production-Related
Compression Facilities.


             "MATERIAL  ADVERSE  EFFECT":   material  adverse  effect  on  the
assets,  Liabilities,  business,  financial condition or results of operations
of the applicable Person and its subsidiaries, taken as a whole.


             "MMBGC PIPE":  the pipe and other materials listed on EXHIBIT A.


                                       4
<PAGE>
             "MPGC PERMITTED ENCUMBRANCES": (i) Encumbrances set forth in
SCHEDULE 4.11, (ii) Encumbrances for taxes not yet delinquent or, if delinquent,
being contested in good faith pursuant to appropriate proceedings; and (iii)
Encumbrances reserved to or vested in any Governmental Authority to control or
regulate any of the MPGC Assets or the Main Pass Business, in any manner, and
all Laws promulgated by any such Governmental Authorities.


             "MPGC UNKNOWN LIABILITIES": all Liabilities of MPGC relating to the
ownership or operation of the Main Pass Business or the Main Pass Assets,
whether such Liabilities exist on the Effective Date or arise thereafter, other
than the Assumed MPGC Obligations and other than the Main Pass Retained
Obligations.


             "MPGS":  the Main  Pass  Gathering  System  as more  particularly
described in the Fifth Restated Partnership Agreement.


             "OLD  CAPITAL  ACCOUNTS":  the  capital  accounts  of an Original
Partner as contemplated by the Fourth Restated Partnership Agreement.


             "ORDER":  any judgment,  order,  injunction,  writ or decree of a
Governmental Authority.


             "PARTNERSHIP PERMITTED ENCUMBRANCES": (i) Encumbrances set forth in
SCHEDULE 3.11, (ii) Encumbrances for taxes not yet delinquent or, if delinquent,
being contested in good faith pursuant to appropriate proceedings; and (iii)
Encumbrances reserved to or vested in any Governmental Authority to control or
regulate any of the Partnership's assets in any manner, and all Laws promulgated
by any such Governmental Authorities.


             "PERSON": any natural person,  corporation,  partnership (general
or  limited),  joint  venture,  limited  liability  company,  other  entity or
Governmental Authority.

            "SEVERALLY, BUT NOT JOINTLY AND SEVERALLY": as used herein, shall
mean (i) that with respect to any representation, warranty, covenant or
agreement of a party hereunder (including the agreements to indemnify, hold
harmless or otherwise compensate a Person hereunder), that such party is making
the representation, warranty, covenant or agreement only with respect to itself
and where expressly indicated in certain circumstances in case of the Original
Partners, the Partnership, and in the case of the New Partners, MPGC and (ii)
that such party shall be liable only for its pro rata share of such obligations
that, in the case of the Original Partners, is a share equal to their respective
Ownership Interests in the Partnership as of the date hereof, and in the case of
the New Partners is a share equal to 1/3.

             "VK 826 EXTENSION": An 8" gas gathering line approximately 17 miles
long from VK Block 826 to MP 225.

                                       5
<PAGE>
      1.1    OTHER  DEFINITIONS.  The  following  terms  are  defined  in  the
indicated sections.

             Definition                                Section
             Agreement                                 Introductory Paragraph
             Assignment                                2.1
             Centana                                   Introductory Paragraph
             Claim                                     10.3
             CNG                                       Introductory Paragraph
             Coastal                                   Introductory Paragraph
             Closing                                   9.1
             Closing Date                              9.1
             DIGC                                      Introductory Paragraph
             Effective Date                            2.7
             Effectiveness                             2.7
             Enforceability Exceptions                 3.2
             Fifth Restated Partnership Agreement      Recitals
             Financial Statements                      3.4
             Fourth Restated Partnership Agreement     Recitals
             MMBGC                                     Introductory Paragraph
             MPGC                                      Introductory Paragraph
             MPGC Balance Sheet                        4.4
             MPGC Balance Sheet Date                   4.4
             MPGC Financial Statements                 4.4
             MPGC Permits                              4.6
             New Capital Contribution                  2.6
             New Partners                              Introductory Paragraph
             New Partners Indemnified Parties          10.1
             Original Partners                         Introductory Paragraph
             Original Partners Indemnified Parties     10.2
             Partners                                  Introductory Paragraph
             Partnership                               Introductory Paragraph
             Partnership Balance Sheet                 3.4
             Partnership Balance Sheet Date            3.4
             Partnership Financial Statements          3.4
             Partnership Permits                       3.6
             PDI                                       Introductory Paragraph
             Purchased Interest                        Recitals
             Reconstituted Partnership                 Recitals

      1.2 UNDEFINED TERMS; DEFINITIONS FROM FIFTH RESTATED PARTNERSHIP
AGREEMENT. Undefined capitalized terms are defined in the Fifth Restated
Partnership Agreement. These terms include: Capital Account, Main Pass
Production-Related Compression Facilities, Management Committee, Ownership
Interests, Managing Partner, Phase I Extension, Project Plans, Majority Approval
and, VK 121 and 124 Extension.

                                       6
<PAGE>
                           ARTICLE II. THE TRANSACTION


      2.1 CONTRIBUTION OF ASSETS. Subject to the terms and conditions of this
Agreement, the New Partners shall cause MPGC to contribute to the Reconstituted
Partnership, and the Partners shall cause the Reconstituted Partnership to
accept as of the Effective Date, the Main Pass Assets. The contribution of the
Main Pass Assets shall be made pursuant to an assignment in the form attached as
EXHIBIT B (the "ASSIGNMENT").


      2.2    ASSUMPTION OF OBLIGATIONS.


            (a) From and after the Effective Date, the New Partners shall assume
      and agree to pay, perform and discharge, as general partners in the
      Reconstituted Partnership, in a timely manner and in accordance with the
      terms of the Fifth Restated Partnership Agreement, their respective
      proportionate share of the Liabilities of the Reconstituted Partnership,
      other than the DIGP Retained Obligations and Damages for which the New
      Partners are released or entitled to indemnity under Article X, whether
      such Liabilities exist on the Effective Date or arise thereafter.


            (b) From and after the Effective Date, the Reconstituted Partnership
      shall assume and agree to pay, perform and discharge, in a timely manner
      and in accordance with the terms of the Fifth Restated Partnership
      Agreement, the Assumed MPGC Obligations and the MPGC Unknown Liabilities,
      other than the Main Pass Retained Obligations and Damages for which the
      Original Partners are released or entitled to indemnity under Article X.


      2.3 ISSUANCE OF RECONSTITUTED PARTNERSHIP INTEREST. As of the Effective
Date, the Original Partners shall enter into the Fifth Restated Partnership
Agreement with the New Partners and thereby cause the New Partners to become
general partners of the Reconstituted Partnership.


      2.4 DETERMINATION OF OWNERSHIP INTERESTS. As of the Effective Date, each
Partner's Ownership Interest in the Reconstituted Partnership shall be the
interest set forth in Section 1.2(a) of the Fifth Restated Partnership
Agreement.


      2.5 CAPITAL ACCOUNTS. On the Effective Date, the initial Capital Accounts
of each Original Partner shall be an amount equal to its Capital Account Balance
(as defined in the Fourth Restated Partnership Agreement) immediately prior to
Effectiveness, which are estimated to total, on the Effective Date,
approximately $80,000,000. On the Effective Date, the initial Capital Account of
each New Partner shall be equal to one-third of $55 million.


      2.6 NEW CAPITAL CONTRIBUTIONS. On or before January 15, 1997, each Partner
shall pay to the Reconstituted Partnership funds in the amount of its share,
based on its Ownership Interest, of (a) all previously incurred costs of the VK
121 and 124 Extension, the Phase I Extension (including without limitation, the
$17.1 million owed the Affiliate of MMBGC for

                                       7
<PAGE>
the MMBGC Pipe) and the Main Pass Production-Related Compression Facilities, to
the extent such Partner has not previously paid such costs, and (b) the
estimated capital expenditure to be incurred within 30 days following January
15, 1997 in connection with the VK 121 and 124 Extension, the Phase I Extension
and the Main Pass Production-Related Compression Facilities together with
interest on the amounts set forth in (a) from December 12, 1996 to the date paid
(each inclusive) calculated at an annual rate of 8.25% (the aggregate of such
amounts are herein referred to as the "NEW CAPITAL CONTRIBUTION").


      2.7 EFFECTIVENESS. Subject to the satisfaction or waiver of the conditions
to effectiveness set forth herein on or before December 31, 1996, the
transactions contemplated hereby shall be effective (the "EFFECTIVENESS") and
the Fifth Restated Partnership Agreement shall become effective at 7:00 a.m.,
Houston, Texas time, on December 31, 1996. Such time and date are referred to
herein as the "EFFECTIVE DATE".


      2.8 CONVEYANCE OF PARTNERSHIP EXCLUDED ASSETS. After the Effective Date,
the Reconstituted Partnership shall assign and convey the Partnership Excluded
Assets to the Original Partners in proportion to their respective Ownership
Interests in the Partnership on the date hereof.

     ARTICLE III. REPRESENTATIONS AND WARRANTIES OF THE ORIGINAL PARTNERS


      Each Original Partner, severally, but not jointly and severally, hereby
represents and warrants to the New Partners as of the date hereof and as of the
Effective Date, as follows:


      3.1 EXISTENCE AND QUALIFICATION. The Partnership is a general partnership
duly organized under the laws of Texas under the provisions of the Texas Revised
Partnership Act. With respect to DIGC only, DIGC is a limited partnership duly
organized and validly existing under the laws of Texas. With respect to MMBGC
and PDI, as applicable, MMBGC and PDI are corporations duly organized, validly
existing and in good standing under the laws of their jurisdiction of
organization. The only general partners of the Partnership are the Original
Partners. The Partnership has the power and authority to own, lease and operate
its property and to carry on its business as now being conducted. The
Partnership conducts no business other than the operation of the DIGS. The
Partnership is duly qualified or licensed to do business in each jurisdiction in
which the character or location of its owned or leased properties or the nature
of its business makes such qualification necessary and the absence of which
would have a Material Adverse Effect.


      3.2 AUTHORIZATION AND VALIDITY OF AGREEMENT AND FIFTH RESTATED PARTNERSHIP
AGREEMENT. Each such Original Partner and the Partnership has full partnership
or corporate power and authority to execute and deliver this Agreement and the
Fifth Restated Partnership Agreement, as applicable, to perform its obligations
hereunder and thereunder and, if applicable, to consummate the transactions
contemplated hereby and thereby. As of the Effective Date, the execution,
delivery and performance of this Agreement and the Fifth Restated Partnership
Agreement by such Original Partner and the Partnership, and the 

                                       8
<PAGE>
consummation by such Person of the transactions contemplated hereby and thereby,
have been duly authorized and approved by each such Person's corporate or
partnership governing authority, and no other action on the part of any such
Person is necessary to authorize the execution, delivery and performance of this
Agreement and the Fifth Restated Partnership Agreement and the consummation of
the transactions contemplated hereby and thereby, as applicable. Each of this
Agreement and the Fifth Restated Partnership Agreement, as applicable, has been
duly executed and delivered by such Original Partner and the Partnership, and is
a valid and binding obligation of such Person enforceable against such Person in
accordance with its terms, except to the extent that its enforceability may be
subject to applicable bankruptcy, insolvency, reorganization, moratorium and
similar laws affecting the enforcement of creditors' rights generally and by
general equitable principles (the "ENFORCEABILITY EXCEPTIONS").


      3.3 CONSENTS AND APPROVALS; NO VIOLATIONS. The execution, delivery and
performance of this Agreement and the Fifth Restated Partnership Agreement, as
applicable, by such Original Partner and the Partnership and the consummation of
the transactions contemplated hereby and thereby will not, with or without the
giving of notice or the lapse of time or both: (a) violate or result in a breach
or default under any provision of the organizational documents of such Person;
(b) violate any Law or Order of any Governmental Authority applicable to such
Person or by which any of such Person's properties or assets may be bound; (c)
to the knowledge of such Original Partner, require any filing by such Original
Partner or the Partnership, with, or require such Person to obtain any permit,
consent or approval of, or require any notice to, any Governmental Authority or
third Person; or (d) result in a violation or breach by such Person of,
constitute (with or without due notice or lapse of time or both) a default by
such Person (or give rise to any right of termination, cancellation, payment or
acceleration) under or result in the creation of any Encumbrance upon any of the
properties or assets of such Person under any Contract to which such Person is a
party, or by which it or any of its properties, assets may be bound, except, in
the case of Sections 3.3(c) and (d), for such violations, permits, approvals,
consents, breaches, defaults, terminations, cancellations, payments,
accelerations which in the aggregate would not have a Material Adverse Effect on
the transactions contemplated hereby, the Partnership or the Reconstituted
Partnership.


      3.4 FINANCIAL STATEMENTS; NO MATERIAL ADVERSE CHANGE. The Original
Partners have heretofore furnished the New Partners with the unaudited balance
sheet (the "PARTNERSHIP BALANCE SHEET") of the Partnership as of September 30,
1996 (the "PARTNERSHIP BALANCE SHEET DATE"), and statements of operations and
cash flows for the period then ended (the "PARTNERSHIP FINANCIAL STATEMENTS"
included in Exhibit G). The Partnership Financial Statements have been prepared
in accordance with generally accepted accounting principles on a consistent
basis and fairly present in all material respects the financial position of the
Partnership, at the date thereof, and the results of operations of the
Partnership and its cash flows for the period indicated. Since the Partnership
Balance Sheet Date, there has been no change with respect to the Partnership
other than such changes as affect generally the industry in which the
Partnership is engaged and changes permitted under Section 6.2, which will cause
a Material Adverse Effect to the Partnership. Except for the VK 121 and 124
Extension, the 

                                       9
<PAGE>
Phase I Extension and as disclosed on SCHEDULE 3.4, all of the DIGS Assets are
reflected on the Partnership Balance Sheet. There are no assets other than the
DIGS Assets on the Partnership Balance Sheet.


      3.5 MATERIAL CONTRACTS. SCHEDULE 3.5 sets forth a list of all material
Contracts of the Partnership in effect as of the date hereof with respect to the
DIGS Assets or DIGS Business, including, without limitation, all gathering
agreements. Except where it would not have a Material Adverse Effect, each such
Contract is in full force and effect, there exists no default or event of
default by the Partnership or event, occurrence, condition or act which, with
the giving of notice, the lapse of time or the happening of any other event or
condition, would become a default or event of default by the Partnership and to
such Original Partner's or the Partnership's knowledge, by any other party
thereto. No notice of termination or of non-renewal of any Contract listed in
SCHEDULE 3.5 has been received by the Partnership or such Original Partner.


      3.6 PERMITS. SCHEDULE 3.6 lists all of the governmental and other third
Person permits, licenses, rights-of-way, consents and authorizations
("PARTNERSHIP PERMITS") pursuant to which the DIGS Assets were constructed and
currently are operated, which are all of the permits required by Law to be held
for the current operation of the DIGS Assets and DIGS Business. Except as set
forth on SCHEDULE 3.6, the Partnership holds all of the Partnership Permits in
its name.


      3.7 LITIGATION. Except as disclosed in SCHEDULE 3.7, and except where it
would not have a Material Adverse Effect, there is no Action pending, or, to the
knowledge of such Original Partner, threatened, against or affecting the
Partnership, the DIGS Business or the DIGS Assets and such Original Partner does
not know of any valid basis for any such Action.


      3.8 COMPLIANCE WITH LAWS. To the knowledge of such Original Partner, the
Partnership is in compliance with all applicable Laws and Orders applicable to
the DIGS Assets or the DIGS Business, except where any noncompliance would not
have a Material Adverse Effect.


      3.9 ABSENCE OF CERTAIN CHANGES. Except as set forth in SCHEDULE 3.7 OR
3.9, since the Partnership Balance Sheet Date, the Partnership has conducted the
DIGS Business only in the ordinary course and, without limitation of the
foregoing, has not:


            (a) except as contemplated by the Project Plan with respect to the
      VK 121 and 124 Extension and Phase I Extension, made any cash calls on any
      Original Partner;


            (b) incurred, or become subject to, any Liability to which it or the
      DIGS Assets will be subject and except current Liabilities incurred in the
      ordinary course of business and the Liabilities contemplated by the
      Project Plans with respect to the VK 121 and 124 Extension and the Phase I
      Extension;


            (c)    subjected any of the DIGS Assets to any  Encumbrance  other
      than a Partnership Permitted Encumbrance;

                                       10
<PAGE>
            (d)    disposed of any material tangible asset;


            (e) introduced any new or significantly changed management,
      operation or accounting practice or policy or operated the DIGS Assets or
      DIGS Business other than substantially as previously operated and in the
      ordinary course;


            (f)    suffered  any  damage,  destruction  or  loss  to the  DIGS
      Assets (whether or not covered by insurance); or


            (g) made or committed to make any capital expenditures for any
      single item in excess of $50,000 other than as required by any Contract
      listed on SCHEDULE 3.5 and/or in connection with the VK 121 and 124
      Extension and the Phase I Extension.


      3.10   ENVIRONMENTAL COMPLIANCE.


            (a) To the knowledge of such Original Partner, the operations of the
      DIGS are in compliance with all Environmental Laws, except where any
      noncompliance would not have a Material Adverse Effect;


            (b) to the knowledge of such Original Partner, no hazardous
      substance that has been generated at or transported from the DIGS has been
      disposed at a site which is on the National Priorities List, the CERCLIS,
      or any analogous list of state Superfund sites, nor has any Governmental
      Authority named the Partnership a potentially responsible party in
      connection with a cleanup authorized by CERCLA;


            (c) neither the Partnership nor such Original Partner has received
      any written notice, mandate, Order or request which remains pending under
      any Environmental Law concerning the DIGS Assets and which relates to any
      substance that is an Environmental Contaminant;


            (d) there is no Action pending against the Partnership or any of the
      Original Partners by any Governmental Authority with respect to the
      presence or release of any Environmental Contaminant from the DIGS; and

            (e) to the knowledge of such Original Partner, there has not been
      released from or on the DIGS any Environmental Contaminant in a quantity
      or concentration which would require remedial action under any
      Environmental Law if reported to the relevant Governmental Authorities.


      3.11 TITLE TO ASSETS. Except for Partnership Permitted Encumbrances and
those Encumbrances listed on SCHEDULE 3.11, the Partnership has good and valid
title, free and clear of all Encumbrances, to the DIGS Assets.


      3.12 ABSENCE OF UNDISCLOSED LIABILITIES. To the knowledge of such Original
Partner, as of the Effective Date, the Partnership and the Reconstituted
Partnership shall have no Liabilities except (i) Liabilities included in the
Partnership Balance Sheet, (ii) Liabilities arising in the ordinary course of
business since the Partnership Balance Sheet Date, (iii) Liabilities 

                                       11
<PAGE>
that would not reasonably be expected to have a Material Adverse Effect on the
Reconstituted Partnership, (iv) Liabilities of MPGC assumed pursuant to Section
2.2, and (v) Liabilities incurred in connection with the VK 121 and 124
Extension and the Phase I Extension.


      3.13 ASSETS EMPLOYED. The DIGS Assets include all assets employed in the
conduct of the DIGS Business as currently conducted. The DIGS Assets are
sufficient to conduct the Partnership's business as currently conducted. The
Partnership does not own or lease any material asset (i) that is not used in the
conduct of its business and is used by any other Person or (ii) which is used
primarily in its business but use of which is made available to other Persons
for matters unrelated to the Partnership's business.


      3.14   INVESTMENTS.  The  Partnership  does not have any  investment  in
any Person.


      3.15   EMPLOYEES.  The  Partnership  has not had  any  employees  at any
time during its existence.


      3.16 ICA/PUHCA. The Partnership is not an "investment company" or a
company "controlled" by an "investment company" within the meaning of the
Investment Company Act of 1940, as amended, or a "holding company", a
"subsidiary company" of a "holding company" or an "affiliate" of a "holding
company" or a "public utility" within the meaning of the Public Utility Holding
Company Act of 1935, as amended.


      3.17   GAS IMBALANCES.  There is no material  imbalance of gas under any
gathering or interconnect agreement to which the Partnership is a party.


      3.18 CONDITION OF ASSETS. The equipment related to the DIGS Assets has
been maintained in satisfactory operating condition and is capable of being used
in the operation of the DIGS Assets without current need for repair or
replacement except in the ordinary course of business.

                  ARTICLE IV. REPRESENTATIONS AND WARRANTIES
                          OF THE NEW PARTNERS AND MPGC

      Each New Partner and MPGC, severally, but not jointly and severally,
hereby represents and warrants to the Original Partners as of the date hereof
and as of the Effective Date, as follows:


      4.1 EXISTENCE AND QUALIFICATION. MPGC is a general partnership duly
organized under the laws of the State of Delaware under the provisions of the
Delaware Uniform Partnership Act. Such New Partner is a corporation duly
organized, validly existing and in good standing under the laws of its
jurisdiction of organization. The only general partners of MPGC are the New
Partners. MPGC has the power and authority to own, lease and operate its
property and business as it is now being conducted. MPGC conducts no business
other than the 

                                       12
<PAGE>
Main Pass Business. MPGC is duly qualified or licensed to do business in each
jurisdiction in which the character or location of its owned or leased
properties or the nature of its business makes such qualification necessary and
the absence of which would have a Material Adverse Effect.


      4.2 AUTHORIZATION AND VALIDITY OF AGREEMENT AND FIFTH RESTATED PARTNERSHIP
AGREEMENT. Each such New Partner and MPGC has full partnership or corporate
power and authority to execute and deliver this Agreement and the Fifth Restated
Partnership Agreement, as applicable, to perform its obligations hereunder and
thereunder, if applicable, and to consummate the transactions contemplated
hereby and thereby. As of the Effective Date, the execution, delivery and
performance of this Agreement and the Fifth Restated Partnership Agreement by
such New Partner and MPGC, if applicable, and the consummation by such Person,
as applicable, of the transactions contemplated hereby and thereby, have been
duly authorized and approved by the Board of Directors of such Person, and no
other action on the part of such Person is necessary to authorize the execution,
delivery and performance of this Agreement and the Fifth Restated Partnership
Agreement and the consummation of the transactions contemplated hereby and
thereby, as applicable. Each of this Agreement and the Fifth Restated
Partnership Agreement, as applicable, has been duly executed and delivered by
the New Partners and MPGC and is a valid and binding obligation of such Person,
enforceable against it in accordance with its terms, except to the extent that
its enforceability may be subject to the Enforceability Exceptions.


      4.3 CONSENTS AND APPROVALS; NO VIOLATIONS. Except as disclosed on
SCHEDULES 4.5 AND 4.6, the execution, delivery and performance of this Agreement
and the Fifth Restated Partnership Agreement, as applicable, by such New Partner
and MPGC, if applicable and the consummation of the transactions contemplated
hereby (including the transfer of the Main Pass Agreements) and thereby will
not, with or without the giving of notice or the lapse of time or both: (a)
violate or result in a breach or default under any provision of the
organizational documents of such Person; (b) violate any Law or Order of any
Governmental Authority applicable to such Person or by which any of such
Person's properties or assets may be bound; (c) to the knowledge of such New
Partner, require any filing by such New Partner or MPGC with, or require such
Person to obtain any permit, consent or approval of, or require any notice to,
any Governmental Authority or third Person; or (d) result in a violation or
breach by any such Person of, constitute (with or without due notice or lapse of
time or both) a default by such Person (or give rise to any right of
termination, cancellation, payment or acceleration) under or result in the
creation of any Encumbrance upon any of the properties or assets of such Person
under any Contract to which such Person is a party, or by which it or any of its
properties or assets may be bound and except, in the case of Sections 4.3(c) and
(d), for such violations, permits, approvals, consents, breaches, defaults,
terminations, cancellations, payments, accelerations which in the aggregate
would not have a Material Adverse Effect on the transactions contemplated
hereby, MPGC or the Reconstituted Partnership.


      4.4 FINANCIAL STATEMENTS; NO MATERIAL ADVERSE CHANGE. The New Partners
have heretofore furnished the Original Partners with the unaudited balance sheet
of MPGC (the "MPGC BALANCE SHEET") as of September 30, 1996 (the "MPGC BALANCE
SHEET DATE"), and 

                                       13
<PAGE>
statements of operations and cash flows for the period then ended (the "MPGC
FINANCIAL STATEMENTS" included in Exhibit G). The MPGC Financial Statements have
been prepared in accordance with generally accepted accounting principles on a
consistent basis and fairly present in all material respects the financial
position of the MPGC, at the date thereof, and the results of operations of MPGC
and its cash flows for the period indicated. Since the MPGC Balance Sheet Date,
there has been no change with respect to MPGC other than such changes as affect
generally the industry in which MPGC is engaged or changes permitted under
Section 5.2, which will cause a Material Adverse Effect to MPGC. Except as
disclosed on SCHEDULE 4.4, all of the Main Pass Assets are reflected on the MPGC
Balance Sheet and there are no assets other than the Main Pass Assets on the
Main Pass Balance Sheet.


      4.5 MATERIAL CONTRACTS. SCHEDULE 4.5 sets forth a list of all material
Contracts of MPGC in effect as of the date hereof with respect to the Main Pass
Assets or the Main Pass Business, including, without limitation, the Main Pass
Agreements and all gathering agreements. Except where it would not have a
Material Adverse Effect, each such Contract is in full force and effect, there
exists no default or event of default by MPGC or event, occurrence, condition or
act which, with the giving of notice, the lapse of time or the happening of any
other event or condition except as set out in Section 4.7, would become a
default or event of default by MPGC and to any New Partner or MPGC's knowledge,
by any other party thereto. No notice of termination or of non-renewal of any
Contract listed in SCHEDULE 4.5 has been received by MPGC or such New Partner.


      4.6 PERMITS. SCHEDULE 4.6 lists all of the governmental and other third
Person permits, licenses, rights-of-way, consents and authorizations ("MPGC
PERMITS") pursuant to which the Main Pass Assets were constructed and currently
are operated, which are all of the permits required by law to be held for the
current operation of the Main Pass Assets and the Main Pass Business. Except as
set forth on SCHEDULE 4.6, MPGC holds all of the MPGC Permits in its name.


      4.7 LITIGATION. Except as disclosed in SCHEDULE 4.7, and except where it
would not have a Material Adverse Effect, there is no Action pending, or, to the
knowledge of such New Partner, threatened, against or affecting MPGC, the Main
Pass Business or the Main Pass Assets, and such New Partner does not know of any
valid basis for any such Action.


      4.8 COMPLIANCE WITH LAWS. To the knowledge of such New Partner, MPGC is in
compliance with all applicable Laws and Orders applicable to the Main Pass
Assets and the Main Pass Business, except where any noncompliance would not have
a Material Adverse Effect.


      4.9 ABSENCE OF CERTAIN CHANGES. Except as set forth in SCHEDULE 4.9, since
the MPGC Balance Sheet Date, MPGC has conducted the Main Pass Business only in
the ordinary course and, without limitation of the foregoing, has not:


            (a) Except in connection with the Main Pass Production-Related
      Compression Facilities and the VK 826 Extension, made any cash calls on
      any of the New Partners;

                                       14
<PAGE>
            (b) incurred, or become subject to, any Liability to which it or the
      Main Pass Assets will be subject and except current Liabilities incurred
      in the ordinary course of business;


            (c)    subjected  any of the Main Pass  Assets to any  Encumbrance
      other than a MPGC Permitted Encumbrance;


            (d)    disposed of any material tangible asset;


            (e) introduced any new or significantly changed management,
      operation or accounting practice or policy or operated the Main Pass
      Assets or Main Pass Business other than substantially as previously
      operated and in the ordinary course;


            (f)    suffered any damage,  destruction  or loss to the Main Pass
      Assets or Main Pass Business (whether or not covered by insurance); or


            (g) made or committed to make any capital expenditures for any
      single item in excess of $50,000 other than as required by any Contract
      listed on SCHEDULE 4.5 and/or in connection with the Main Pass
      Production-Related Compression Facilities and the VK 826 Extension.


      4.10   ENVIRONMENTAL COMPLIANCE.


            (a) To the knowledge of such New Partner, the operations of the Main
      Pass Business and Main Pass Assets are in compliance with all
      Environmental Laws, except where any noncompliance would not have a
      Material Adverse Effect;


            (b) to the knowledge of such New Partner, no hazardous substance
      that has been generated at or transported from any of the Main Pass Assets
      has been disposed at a site which is on the National Priorities List, the
      CERCLIS, or any analogous list of state Superfund sites, nor has any
      Governmental Authority named MPGC or any New Partner a potentially
      responsible party in connection with a cleanup authorized by CERCLA;


            (c) neither MPGC nor any of the New Partners has received any
      written notice, mandate, Order or request which remains pending under any
      Environmental Law concerning any of the Main Pass Assets or the Main Pass
      Business and which relates to any substance that is an Environmental
      Contaminant;


            (d) there is no Action pending against MPGC or such New Partner by
      any Governmental Authority with respect to the presence or release of any
      Environmental Contaminant from any of the Main Pass Assets; and


            (e) to the knowledge of such New Partner, there has not been
      released from or on the Main Pass Assets any Environmental Contaminant in
      a quantity or concentration which would require remedial action under any
      Environmental Law if reported to the relevant Governmental Authorities.

                                       15
<PAGE>
      4.11 TITLE TO ASSETS. Except for MPGC Permitted Encumbrances and those
Encumbrances listed on SCHEDULE 4.11, MPGC has good and valid title, free and
clear of all Encumbrances, to the Main Pass Assets.


      4.12 ABSENCE OF UNDISCLOSED LIABILITIES. To the knowledge of such New
Partners, as of the Effective Date, MPGC shall have no Liabilities except (i)
Liabilities included in the MPGC Balance Sheet except as provided in SCHEDULE
4.9, (ii) Liabilities arising in the ordinary course of business since the MPGC
Balance Sheet Date, (iii) Liabilities that would not reasonably be expected to
have a Material Adverse Effect on MPGC, (iv) Liabilities incurred in connection
with the Main Pass Production-Related Compression Facilities and the VK 826
Extension, and (v) letters from producers/shippers alleging constraint under the
Main Pass Agreements.


      4.13 ASSETS EMPLOYED. The Main Pass Assets listed on SCHEDULE 4.13 include
all assets employed in the conduct of the Main Pass Business as currently
conducted. The Main Pass Assets are sufficient to operate the Main Pass Business
as currently conducted. MPGC does not own or lease any material asset (i) that
is not used in the conduct of its business and is used by any other Person or
(ii) which is used primarily in its business but use of which is made available
to other Persons for matters unrelated to MPGC's business.


      4.14   INVESTMENTS.  MPGC does not have any investment in any Person.


      4.15   EMPLOYEES.  MPGC has not had any  employees  at any  time  during
its existence.


      4.16 ICA/PUHCA. MPGC is not an "investment company" or a company
"controlled" by an "investment company" within the meaning of the Investment
Company Act of 1940, as amended, or a "holding company", a "subsidiary company"
of a "holding company" or an "affiliate" of a "holding company" or a "public
utility" within the meaning of the Public Utility Holding Company Act of 1935,
as amended.


      4.17   GAS IMBALANCES.  There is no material  imbalance of gas under any
gathering or interconnect agreement to which MPGC is a party.


      4.18 CONDITION OF ASSETS. The equipment related to the Main Pass Assets
has been maintained in satisfactory operating condition and is capable of being
used in the operation of the Main Pass Assets without current need for repair or
replacement except in the ordinary course of business.


                                       16
<PAGE>
              ARTICLE V. COVENANTS OF THE NEW PARTNERS AND MPGC


      Each of the New Partners and MPGC hereby covenants and agrees with the
Original Partners as follows:


      5.1 COOPERATION BY THE NEW PARTNERS. Such New Partner and MPGC shall use
its reasonable efforts to cooperate with the Original Partners and the
Partnership to secure all necessary consents, approvals, authorizations,
exemptions and waivers from third parties as shall be required to enable the
Original Partners and the Partnership to effect the transactions contemplated
hereby, and such New Partner and MPGC shall otherwise use its reasonable efforts
to cause the consummation of such transactions in accordance with the terms and
conditions hereof and to cause all conditions contained in this Agreement over
which it has control to be satisfied. Such New Partner and MPGC further agrees
to deliver to the Original Partners prompt written notice of any event or
condition which if it existed on the date of this Agreement, would result in any
of the representations and warranties of the New Partners contained herein being
untrue in any material respect.


      5.2 CONDUCT OF BUSINESS. Except as the Original Partners may otherwise
consent to in writing, between the date hereof and the Effective Date, MPGC
shall:


            (a)    conduct  business in  connection  with the Main Pass Assets
      only in the ordinary course,


            (b) use its reasonable efforts to maintain satisfactory
      relationships with any suppliers, lessors, distributors, customers,
      clients and others in connection with the Main Pass Assets and MPGC,


            (c) maintain, consistent with past practice and good business
      judgment, all the Main Pass Assets in customary repair, order and
      condition, ordinary wear and tear excepted, and insurance or
      self-insurance upon all such assets in such amounts and of such kinds
      comparable to that in effect on the date hereof,


            (d)    maintain  the  books  and  records  of MPGC  in the  usual,
      regular and ordinary manner, on a basis consistent with past practice,


            (e) not incur, or become subject to, any Liability to which it or
      its assets will be subject and except current Liabilities incurred in the
      ordinary course of business which in the aggregate would not cause a
      Material Adverse Effect to the Main Pass Assets or MPGC, other than
      Contracts listed in SCHEDULE 4.5, Liabilities incurred in connection with
      the Main Pass Production-Related Compression Facilities, and the
      construction of the VK 826 Extension,


            (f)    not subject any of its assets to any Encumbrance,

                                       17
<PAGE>
            (g)    not dispose of any material tangible asset,


            (h) not introduce any new or significantly changed management,
      operation or accounting practice or policy or operate the Main Pass Assets
      or Main Pass Business other than substantially as previously operated and
      in the ordinary course,


            (i) not make or commit to make any capital expenditures for any
      single item in excess of $50,000 other than as required by any Contract
      listed on SCHEDULE 4.5, in connection with the Main Pass
      Production-Related Compression Facilities and the VK 826 Extension, and


            (j)    pay all  payments  under its  Contracts  as they first come
      due.


      5.3 EXCLUSIVE DEALING. From the date of this Agreement to the earlier of
the Effective Date or the termination of this Agreement, such New Partner and
MPGC shall not take any action to, directly or indirectly, encourage, initiate
or engage in discussions or negotiations with, or provide any information to,
any Person other than the Original Partners and the Partnership, concerning any
sale or other transfer of the Main Pass Assets or the Main Pass Business or any
material part thereof or a similar transaction involving such New Partner or its
Affiliates.


      5.4 GOVERNMENTAL FILINGS. Each New Partner agrees that it will cooperate
with the other Partners in all respects in connection with any required
governmental filings including filings under the HSR Act, and in connection with
any requests for information or further filings which may be necessary to obtain
the necessary consents (or to allow the applicable time periods to expire) with
respect thereto. The New Partners and the Original Partners each shall deliver
to the other and its respective counsel drafts of such filings and all other
materials to be submitted sufficiently in advance of any such submission so that
the parties and their respective counsel may review and comment upon such
filings and other materials. The costs of any such filings shall be borne and
paid by the Partners based on their respective Ownership Interests.


      5.5 FURTHER ASSURANCES. At any time or from time to time after the
Effective Date, the New Partners shall, at the reasonable request of the
Original Partners, execute and deliver any further instruments or documents and
take all such further action as the Original Partners may reasonably request to
consummate and make effective the transactions contemplated by this Agreement.


       5.6   AD VALOREM TAXES.  Prior to the Effective  Date, the New Partners
shall  cause MPGC to accrue  and pay for any  unpaid ad valorem  taxes due for
all periods prior to the Effective Date.


       5.7 NEW CAPITAL CONTRIBUTIONS. Each New Partner shall contribute its
share of the New Capital Contributions to the Reconstituted Partnership (based
on its Ownership Interest); provided that any such New Partner, subject to the
provisions for interest set forth in Section 2.6, may defer payment of such
amounts until January 15, 1997.

                                       18
<PAGE>
       5.8 DELIVERY OF NEW SCHEDULES. From time-to-time, the New Partners will
notify the Original Partners in writing of any changes that would be required to
make the schedules to this Agreement true and correct as of Closing.


       5.9 CLARIFICATION OF TERMS IN GATHERING AGREEMENTS. MPGC shall diligently
seek to obtain documentation reasonably satisfactory to the Original Partners
that producers/shippers under the gathering Contracts listed in SCHEDULE 4.5
will be limited to gathering under such agreements to the Main Pass Assets, and
that such agreements shall not be construed to provide for gathering on DIGS on
or after the Effective Date.


       5.10 CONSENTS. MPGC shall diligently seek to obtain consents and
authorizations required under the Main Pass Agreements for the assignment of the
Main Pass Agreements to the Reconstituted Partnership.

        ARTICLE VI. COVENANTS OF ORIGINAL PARTNERS AND THE PARTNERSHIP


      Each of the Original Partners and the Partnership hereby covenants and
agrees with MPGC and the New Partners as follows:


      6.1 COOPERATION BY ORIGINAL PARTNERS. Such Original Partner will use its
reasonable efforts, and will cooperate with the New Partners and MPGC to secure
all necessary consents, approvals, authorizations, exemptions and waivers from
third parties as shall be required to enable the New Partners and MPGC to effect
the transactions contemplated herein, and such Original Partner and the
Partnership will otherwise use its reasonable efforts to cause the consummation
of such transactions in accordance with the terms and conditions hereof and to
cause all conditions contained in this Agreement over which it has control to be
satisfied. Such Original Partner and the Partnership further agree to deliver to
MPGC prompt written notice of any event or condition, which if it existed on the
date of this Agreement, would result in any of the representations and
warranties of such Original Partner contained herein being untrue in any
material respect.


      6.2 CONDUCT OF BUSINESS. Except as the New Partners may otherwise consent
to in writing, between the date hereof and the Effective Date, the Partnership
shall:


            (a)    conduct  business in  connection  with the DIGS Assets only
      in the ordinary course,


            (b) use its reasonable efforts to maintain satisfactory
      relationships with any suppliers, lessors, distributors, customers,
      clients and others in connection with the DIGS Assets and the Partnership,


            (c) maintain, consistent with past practice and good business
      judgment, all the DIGS Assets in customary repair, order and condition,
      ordinary wear and tear excepted, 

                                       19
<PAGE>
      and insurance upon all such assets in such amounts and of such kinds
      comparable to that in effect on the date hereof,


            (d)    maintain  the books and records of the  Partnership  in the
      usual,  regular and ordinary  manner,  on a basis  consistent  with past
      practice,


            (e) not incur, or become subject to, any Liability to which it or
      its assets will be subject and except current Liabilities incurred in the
      ordinary course of business which in the aggregate would not cause a
      Material Adverse Effect to the Partnership or the DIGS Assets, other than
      Contracts listed in Schedule 3.5, and Liabilities incurred in connection
      with the VK 121 and 124 Extension and the Phase I Extension,


            (f)    not subject any of its assets to any Encumbrance,


            (g)    not dispose of any material tangible asset,


            (h) not introduce any new or significantly changed management,
      operation or accounting practice or operate the DIGS Assets or Partnership
      other than substantially as previously operated and in the ordinary
      course, except as may be required to comply with the Natural Gas Act of
      1938, as amended,


            (i) not make or commit to make any capital expenditures for any
      single item in excess of $50,000 other than as required by any Contract
      listed on SCHEDULE 3.5 and/or in connection with the VK 121 and 124
      Extension or the Phase I Extension, and


            (j)    pay all payments under its Contracts as they come due.


      6.3 EXCLUSIVE DEALING. From the date of this Agreement to the earlier of
the Effective Date or the termination of this Agreement, such Original Partner
and the Partnership shall not take any action to, directly or indirectly,
encourage, initiate or engage in discussions or negotiations with, or provide
any information to, any Person other than the New Partners and MPGC, concerning
any sale or other transfer of the DIGS Assets or the DIGS Business or any
material part thereof or a similar transaction involving such Original Partner
or its Affiliates.


      6.4 GOVERNMENTAL FILINGS. Each Original Partner agrees that it will
cooperate with the other Partners in all respects in connection with any
required governmental filings including filings under the HSR Act, and in
connection with any requests for information or further filings which may be
necessary to obtain the necessary consents (or to allow the applicable time
periods to expire) with respect thereto. The New Partners and the Original
Partners each shall deliver to the other and its respective counsel drafts of
such filings and all other materials to be submitted sufficiently in advance of
any such submission so that the parties and their respective counsel may review
and comment upon such filings and other materials. The costs of any such filings
shall be borne and paid by the Partners based on their respective Ownership
Interests.

                                       20
<PAGE>
      6.5 FURTHER ASSURANCES. At any time or from time to time after the date
hereof, the Original Partners shall, at the request of MPGC and/or the New
Partners, execute and deliver any further instruments or documents and take all
such further action as the New Partners may reasonably request to consummate and
make effective the transactions contemplated by this Agreement.


       6.6   AD VALOREM  TAXES.  Prior to the  Effective  Date,  the  Original
Partners  shall  cause the  Partnership  to accrue  and pay for any  unpaid ad
valorem taxes due for all periods prior to the Effective Date.


       6.7 NEW CAPITAL CONTRIBUTIONS. Each Original Partner shall contribute its
share of the New Capital Contributions to the Reconstituted Partnership (based
on Ownership Interests); provided that any such Original Partner, subject to the
provisions for interest set forth in Section 2.6, may defer payment of such
amounts until January 15, 1997, except for amounts due pursuant to the Fourth
Restated Partnership Agreement which shall be paid when due under such
agreement.


       6.8 NEW SCHEDULES. From time to time, the Original Partners will notify
the New Partners in writing of any changes that would be required to make the
schedules to this Agreement true and correct as of Closing.

       ARTICLE VII. CONDITIONS TO ORIGINAL PARTNERS' AND PARTNERSHIP'S
                                   OBLIGATIONS


             The obligations of each Original Partner and the Partnership under
this Agreement to consummate the transactions contemplated hereby shall be
subject to the satisfaction (or waiver in writing by each Original Partner) on
or prior to the dates set forth below of all of the following conditions:


       7.1 PERFORMANCE OF AGREEMENTS AND REPRESENTATION. Each of the agreements
and covenants of each New Partner to be performed on or before the date hereof,
the Closing Date or the Effective Date pursuant to the terms hereof shall have
been duly performed in all material respects on or prior to such applicable
date, and all representations and warranties of MPGC and each New Partner shall
be true in all material respects as of the date hereof; provided, however, each
Original Partner and the Partnership shall be deemed to have waived any breach
of the representations and warranties of MPGC or the New Partners based upon
facts of which such Original Partner or the Partnership had actual knowledge, on
or before the date hereof.


       7.2 NO LITIGATION THREATENED. On or before the Effective Date, no Action
shall have been instituted to restrain or prohibit any of the transactions
contemplated hereby except any Action disclosed on SCHEDULES 3.7 OR 4.7.


       7.3 GOVERNMENTAL APPROVALS. All Governmental Authority consents and
approvals (including consents under the HSR Act), if any, necessary to permit
the consummation of the 

                                       21
<PAGE>
transactions contemplated by this Agreement shall have been received, on or
before the Effective Date.


      7.4 OTHER CONSENTS. Each consent required to contribute the MPGC Assets to
 the Reconstituted Partnership, including, without limitation, all consents
 required to assign the Main Pass Agreements, shall have been obtained on or
 before the Effective Date.


       7.5 CONSENTS OF THE ORIGINAL PARTNERS' BOARDS OF DIRECTORS. All necessary
corporate approvals of each Original Partner shall have been obtained on or
before the Effective Date.


       7.6 NO MATERIAL CHANGE. Since the MPGC Balance Sheet Date and until the
date hereof, there has been no material change to MPGC other than such changes
as affect generally the industry in which MPGC is engaged, and other than
changes related to the VK 826 Extension and the Main Pass Production-Related
Compression Facilities, which will cause a Material Adverse Effect to MPGC or
the Reconstituted Partnership.


       7.7 NO DAMAGE. On or before the date hereof, the Main Pass Assets shall
not have suffered any damage, destruction or loss that is not fully covered by
insurance that, in the aggregate, exceeds $1,000,000.

     ARTICLE VIII. CONDITIONS TO THE NEW PARTNERS' AND MPGC'S OBLIGATIONS


      The obligations of each New Partner and MPGC under this Agreement to
consummate the transactions contemplated hereby shall be subject to the
satisfaction (or waiver in writing by each New Partner) on or prior to the dates
set forth below of all of the following conditions:


      8.1 PERFORMANCE OF AGREEMENTS AND REPRESENTATIONS. Each of the agreements
 and covenants of each Original Partner to be performed on or before the date
 hereof, the Closing Date or the Effective Date pursuant to the terms hereof
 shall have been duly performed on or before such applicable date, and all
 representations and warranties of the Partnership and each Original Partner
 shall be true in all material respects as of the date hereof; provided,
 however, that each New Partner and MPGC shall be deemed to have waived any
 breach of the representations and warranties of the Partnership or the Original
 Partners based upon facts of which such New Partner or MPGC had actual
 knowledge, on or before the date hereof.


      8.2 NO LITIGATION THREATENED. On or before the Effective Date, no Action
shall have been instituted to restrain or prohibit any of the transactions
contemplated hereby, except any Action disclosed on Schedules 3.7 or 4.7.


      8.3 GOVERNMENTAL APPROVALS. All Governmental Authority consents and
approvals (including consent under the HSR Act), if any, necessary to permit the
consummation of the transactions contemplated by this Agreement shall have been
received on or before the Effective Date.

                                       22
<PAGE>
      8.4 OTHER CONSENTS. Each consent required to contribute the MPGC Assets to
 the Reconstituted Partnership, including, without limitation, all consents
 required to assign the Main Pass Agreements, shall have been obtained on or
 before the Effective Date.


       8.5 CONSENTS OF THE NEW PARTNERS' BOARDS OF DIRECTORS. All necessary
corporate approvals of each New Partner shall have been obtained on or before
the Effective Date.


       8.6 NO MATERIAL CHANGE. Since the Partnership Balance Sheet Date until
the date hereof, there has been no material change to the Partnership other than
such changes as affect generally the industry in which the Partnership is
engaged, and other than changes related to the VK 121 and 124 Extension, the
Phase I Extension and the Petition for Declaratory Order of Dauphin Island
Gathering System, which will cause a Material Adverse Effect to the Partnership
or the Reconstituted Partnership.


       8.7 NO DAMAGE. On or before the date hereof, DIGS shall not have suffered
any damage, destruction or loss that is not fully covered by insurance that, in
the aggregate, exceeds $1,000,000.

                               ARTICLE IX. CLOSING

       9.1 PLACE AND TIME. The Closing of the transactions contemplated hereby
(the "CLOSING" (the date which is referred to as the "CLOSING DATE") shall take
place at the offices of Akin, Gump, Strauss, Hauer & Feld, L.L.P., 711 Louisiana
Street, Suite 1900, Houston, Texas, at 7:00 a.m. Houston, Texas time on December
31, 1996, or any mutually agreed earlier date. All matters at the Closing shall
be considered to take place simultaneously, and no delivery of any document
shall be deemed complete until all transactions and deliveries of documents
contemplated hereby are completed.


      9.2    CLOSING OBLIGATIONS.  At the Closing:


            (a) the Original Partners shall deliver, or shall have caused to be
      released from escrow, as applicable, the following duly executed
      documents, in substantially the form set forth in the Exhibit
      corresponding to such document, as follows:




       DOCUMENT:                              EXHIBIT:

       Fifth Amended and Restated
       Partnership Agreement                  C
       Agreement Regarding Jurisdictionality  D
       Coastal Processing Plant Option
       Agreement                              E
       CNG Processing Plant Option Agreement  F



                                       23
<PAGE>

            (b) MPGC shall deliver, or shall have caused to be released from
      escrow, as applicable, (i) an executed Assignment of Contract Rights and
      Bill of Sale, in substantially the form set forth as Exhibit B, and (ii)
      any consents required by Section 8.4.



            (c) The New Partners shall deliver or shall have caused to be
      released from escrow, as applicable, the following duly executed
      documents, in substantially the form set forth in the Exhibit
      corresponding to such document, as follows:


       DOCUMENT:                              EXHIBIT:

       Fifth Amended and Restated
       Partnership Agreement                  C
       Agreement Regarding Jurisdictionality  D
       Coastal Processing Plant Option
       Agreement (delivery required of
       Coastal only)                          E
       CNG Processing Plant Option Agreement
       (delivery required of CNG only)        F

       9.3 RECORDS. MPGC shall cause the Main Pass Records to be delivered to
the Managing Partner no later than sixty (60) days after the Effective Date, but
may retain copies of such Records.

                           ARTICLE X. INDEMNIFICATION

      10.1 INDEMNIFICATION OF THE NEW PARTNERS. Each Original Partner,
severally, but not jointly and severally, from and after the Effective Date,
shall indemnify, defend and hold each New Partner, its Affiliates and their
respective directors, officers and shareholders (collectively, "NEW PARTNERS
INDEMNIFIED PARTIES"), harmless from and against any and all Damages suffered by
each of the New Partners Indemnified Parties as a result of, caused by, arising
out of, or in any way relating to (i) any breach of any representation or
warranty of such Original Partner and/or the Partnership contained in or made
pursuant to this Agreement, (ii) any breach of any covenant or agreement of such
Original Partners and/or the Partnership contained in or made pursuant to this
Agreement, and (iii) the construction, ownership and operation of the DIGS
Assets or the DIGS Business prior to the Effective Date.


      10.2 INDEMNIFICATION OF THE ORIGINAL PARTNERS. Each New Partner,
severally, but not jointly and severally, from and after the Effective Date,
shall indemnify, defend and hold each Original Partner, its respective
Affiliates, and their respective directors, officers and shareholders
(collectively, the "ORIGINAL PARTNERS INDEMNIFIED PARTIES") harmless from and
against any and all Damages suffered by each of the Original Partners
Indemnified Parties as a result of, caused by, arising out of, or in any way
relating to (i) any breach of any representation or warranty of such New Partner
and/or MPGC contained in or made pursuant to this Agreement, (ii) any breach of
any 

                                       24
<PAGE>
covenant or agreement of such New Partners and/or MPGC contained in or made
pursuant to this Agreement, and (iii) the construction, ownership or operation
of the Main Pass Assets or Main Pass Business prior to the Effective Date.


      10.3 DEMANDS. Each indemnified Person hereunder agrees that promptly upon
its discovery of facts giving rise to a claim for indemnity hereunder (a
"CLAIM"), it will give prompt written notice thereof to the indemnifying party,
together with a statement of such information respecting any of such facts as it
may have and a formal demand for indemnification. The indemnifying party shall
not be obligated to indemnify the indemnified Person with respect to any Claim
if the indemnified Person knowingly fails to notify the indemnifying party in
sufficient time to permit the indemnifying party to defend against such matter
and to make a timely response thereto, only insofar as such knowing failure to
notify the indemnifying party has actually resulted in prejudice or Damage to
the indemnifying party.


      10.4 RIGHT TO CONTEST AND DEFEND. The indemnifying party shall be entitled
at its cost and expense to contest and defend by all appropriate Actions any
Claim with respect to which it is called upon to indemnify the indemnified
Person; PROVIDED, if the indemnifying party shall decide not to contest and
defend such Action it shall deliver notice of its intention to not so contest to
the indemnified Person within 20 days after the date of receipt by the
indemnifying party of notice by the indemnified Person of the assertion of the
Claim. Any such contest may be conducted in the name and on behalf of the
indemnifying party or the indemnified Person as may be appropriate. The
indemnified party shall have the right but not the obligation to participate in
such proceedings and to be represented by counsel of its own choosing at its
sole cost and expense. The indemnifying party shall have full authority to
determine all action to be taken with respect thereto; PROVIDED, HOWEVER, that
the indemnifying party will not have the authority to subject the indemnified
party to any obligation whatsoever, other than the performance of purely
ministerial tasks or obligations not involving material expense. If the
indemnifying party does not elect to contest any such Claim, the indemnifying
party shall be bound by the result obtained with respect thereto by the
indemnified Person. At any time after the commencement of the defense of any
Claim, the indemnifying party may request the indemnified Person to agree in
writing to the abandonment of such contest or to the payment or compromise by
the indemnified party of the asserted Claim, whereupon such action shall be
taken unless the indemnified Person determines that the contest should be
continued, and so notifies the indemnifying party in writing within 15 days of
such request from the indemnifying party. If the indemnified Person determines
that the contest should be continued, the indemnifying party shall be liable
hereunder only to the extent of the amount that the other Person to the
contested Claim had agreed unconditionally to accept in payment or compromise as
of the time the indemnifying party made its request therefor to the indemnified
Person.


      10.5 COOPERATION. If requested by the indemnifying party, the indemnified
Person shall cooperate with the indemnifying party and its counsel in contesting
any Claim that the indemnifying party elects to contest or, if appropriate, in
making any counterclaim against the Person asserting the Claim, or any
cross-complaint against any Person, and the indemnifying 

                                       25
<PAGE>
party will reimburse the indemnified Person for any expenses it incurs by so
cooperating. The indemnified Person shall afford the indemnifying party and its
counsel the opportunity to be present at, and to participate in, conferences
with all persons asserting any Claim against the indemnified Person or
conferences with representatives of or counsel for such Persons.


      10.6 PAYMENT OF DAMAGES. The indemnifying party shall pay to the
indemnified Person in immediately available funds any amounts to which the
indemnified Person may become entitled by reason of the provisions of this
Agreement, such payment to be made within five days after any such amounts are
finally determined either by mutual agreement of the parties hereto or pursuant
to the final unappealable judgment of a court of competent jurisdiction or
binding award of an arbitration panel of proper jurisdiction. In calculating any
amount to be paid by an indemnifying party by reason of the provisions of this
Agreement, the amount shall be reduced by all net tax benefits and other
reimbursements actually received by the indemnified Person related to the
Damages.


      10.7   LIMITATIONS ON LIABILITY.


            (a) No Original Partner shall be required or obligated to indemnify
      or otherwise compensate any of the New Partners Indemnified Parties under
      Section 10.1(i), under Section 10.1(ii) with respect to a breach of
      Section 6.8 or under Section 10.1(iii) of this Agreement unless the
      aggregate amount of Damages which such New Partners Indemnified Party
      would, but for the provisions of this Article X, have incurred exceeds an
      amount equal to the product of $500,000 multiplied by the Ownership
      Interest of such Original Partner in the Partnership on the date hereof,
      and then only to the extent of any such excess. No New Partner shall be
      required or obligated to indemnify or otherwise compensate any of the
      Original Partners Indemnified Parties under Section 10.2(i), under Section
      10.2(ii) with respect to a breach of Section 5.8 or under Section
      10.2(iii) of this Agreement unless the aggregate amount of Damages for
      which such Original Partners Indemnified Parties would, but for the
      provisions of this Article X, have incurred exceeds an amount equal to the
      product of $500,000 multiplied by 1/3, and then only to the extent of any
      such excess.


            (b) The maximum amount for which an Original Partner shall be
      required or obligated to indemnify or otherwise compensate the New
      Partners Indemnified Parties under Section 10.1(i), under Section 10.1(ii)
      with respect to a breach of Section 6.8 or under Section 10.1(iii) of this
      Agreement, in the aggregate, shall be limited to an amount equal to the
      product of such Original Partners' Ownership Interest in the Partnership
      on the date hereof multiplied by $20,000,000, except for claims made
      against such Original Partner for breach by such Original Partner of
      Sections 3.1, 3.2 or 3.3. The maximum amount for which a New Partner shall
      be required or obligated to indemnify or otherwise compensate the Original
      Partners Indemnified Parties under Section 10.2(i), under Section 10.2(ii)
      with respect to a breach of Section 5.8 or under Section 10.2(iii) of this
      Agreement, in the aggregate, shall be limited to an amount equal to 1/3
      multiplied by $20,000,000, except for claims made against such New Partner
      for breach by such New Partner of Sections 4.1, 4.2 or 4.3.


                                       26
<PAGE>
            (c) Notwithstanding any other provision in this Agreement to the
      contrary, none of Original Partners shall be required or obligated to
      indemnify or otherwise compensate any of the New Partners Indemnified
      Parties under Section 10.1 for any Damages as a result of, caused by,
      arising out of, or in any way relating to the VK 121 and 124 Extension or
      the Phase I Extension except to the extent such Original Partner would
      have been obligated to indemnify the New Partners Indemnified Parties
      under the Reconstituted Partnership Agreement had the Reconstituted
      Partnership Agreement been in effect at such time.


            (d) Notwithstanding any other provision in this Agreement to the
      contrary, none of New Partners shall be required or obligated to indemnify
      or otherwise compensate any of the Original Partners Indemnified Parties
      under Section 10.2 for any Damages as a result of, caused by, arising out
      of, or in any way relating to the Main Pass Production-Related Compression
      Facilities and the VK 826 Extension, except to the extent such New Partner
      would have been obligated to indemnify the Original Partners Indemnified
      Parties under the Reconstituted Partnership Agreement had the
      Reconstituted Partnership Agreement been in effect at such time.


            (e) Each of the Original Partners Indemnified Parties' and the New
      Partners Indemnified Parties' sole and exclusive remedy with respect to
      (i) any and all Claims relating to the representations, warranties,
      covenants and agreements contained in this Agreement or (ii) other Claims
      pursuant to or in connection with this Agreement shall be pursuant to the
      indemnification provisions set forth in this Article X and, in furtherance
      of the foregoing, each such Person hereby waives, to the fullest extent
      permitted under applicable Law, any and all rights, claims and causes of
      Action it may have against the other arising under or based upon any Law.


            (f) Anything herein to the contrary notwithstanding, no breach of
      any representation, warranty, covenant or agreement contained herein shall
      give rise to any right on the part of any party after the consummation of
      the transactions contemplated hereby to rescind this Agreement or any of
      the transactions contemplated hereby.


            (g) Each of the Original Partners Indemnified Parties and the New
      Partners Indemnified Parties shall take all reasonable steps to mitigate
      all Damages upon and after becoming aware of any event which could
      reasonably be expected to give rise to any Damages that are indemnifiable
      hereunder.


            (h) No party shall have any Liability hereunder to any indemnified
      Person for any breach, misrepresentation or noncompliance with respect to
      any representation, warranty, covenant or obligation contained herein if
      the fulfillment of which has been waived by such indemnified Person.


            (i) After the Effective Date, no party shall be required or
      obligated to indemnify or otherwise compensate an indemnified Person under
      this Agreement if the indemnified Person asserting the Claim had knowledge
      of the relevant facts at or before the Effective Date.


                                       27
<PAGE>
            (j) No party shall be liable to any indemnified Person for any
      exemplary or punitive Damages or for loss of profits or consequential
      losses (other than such exemplary or punitive Damages or loss of profits
      or consequential losses for which such Person is liable to a Person not a
      member of the Original Partners Indemnified Parties or the New Partners
      Indemnified Parties) because of the provisions of this Article X, EVEN IF
      CAUSED BY THE SOLE, JOINT, CONTRIBUTORY AND/OR COMPARATIVE NEGLIGENCE,
      STRICT LIABILITY, AND/OR OTHER FAULT OF SUCH PARTY OR AFFILIATE.


            (k) The indemnities provided for in this Article X are expressly
      limited to Claims asserted by written notice given by the indemnified
      Person to the relevant indemnifying party prior to November 30, 1998.


            (l) EXCEPT AS EXPRESSLY SET FORTH IN ARTICLE 4, THE NEW PARTNERS ARE
      NOT MAKING, AND THE ORIGINAL PARTNERS HEREBY WAIVE, ANY WARRANTY OR
      REPRESENTATION, EXPRESS OR IMPLIED, AS TO THE QUALITY, MERCHANTABILITY,
      FITNESS FOR A PARTICULAR PURPOSE, CONFORMITY TO SAMPLES, OR CONDITION OF
      MPGS ASSETS OR ANY PART THEREOF, AND THE MPGS ASSETS ARE TRANSFERRED AND
      CONTRIBUTED, AND THE ORIGINAL PARTNERS ACCEPT, MPGS ASSETS "AS IS, WITH
      ALL FAULTS."

                             ARTICLE XI. TERMINATION


      11.1   TERMINATION.


            (a) This Agreement may be terminated and the transactions
      contemplated hereby may be abandoned by the New Partners in writing,
      without Liability on the part of the terminating Person on account of such
      termination (provided the terminating Person is not otherwise in default
      or breach of this Agreement) at any time prior to the Effective Date, if
      the Original Partners shall fail to perform its or their covenants or
      agreements contained herein required to be performed prior to the
      Effective Date or if the conditions set forth in Sections 8.2, 8.3, 8.4
      and 8.5 are not satisfied or waived as of and at the Effective Date.


            (b) This Agreement may be terminated and the transactions
      contemplated hereby may be abandoned by the Original Partners, in writing,
      without Liability on the part of the terminating Person on account of such
      termination (provided the terminating Person is not otherwise in default
      or breach of this Agreement) at any time prior to the Effective Date if
      the New Partners shall fail to perform its or their covenants or
      agreements contained herein required to be performed on or prior to the
      Effective Date, or if the conditions set forth in Sections 7.2, 7.3, 7.4
      and 7.5 are not satisfied or waived as of and at the Effective Date.

                                       28
<PAGE>
      11.2 EFFECT ON OBLIGATIONS. Termination of this Agreement pursuant to
Section 11.1 shall terminate all obligations of the parties hereunder, except
for the obligations under Article XII and the obligations set forth in the next
two sentences of this Section 11.2; provided, however, termination shall not
relieve a Person that has breached this Agreement from liability under this
Agreement. Upon termination of this Agreement each Person hereto will redeliver
all documents, work papers and other material of any other Person relating to
the transactions contemplated hereby, and all copies of such materials, whether
so obtained before or after the execution hereof, to the Person furnishing the
same. Notwithstanding such termination, the obligations of the Partners under
the Confidentiality Agreement dated June 14, 1996, among the Partnership and
MPGC shall survive; PROVIDED that none of the Partnership, MPGC, any New Partner
or any Original Partner shall assert a claim on the basis of such
confidentiality agreements in connection with any Person to this Agreement or
any Affiliate thereof extending its gathering system and services or
constructing additional gathering systems.

                                  ARTICLE XII.

                                  MISCELLANEOUS

      12.1 ENTIRE AGREEMENT. This Agreement (including the Exhibits and
Schedules) and the Confidentiality Agreement dated June 14, 1996, among the
Partnership and MPGC set forth the entire understanding of the parties with
respect to the subject matter hereof. Any previous agreements or understandings
(whether oral or written) between the parties regarding the subject matter
hereof are merged into and superseded by this Agreement.


      12.2 SUCCESSORS AND ASSIGNS. The terms and conditions of this Agreement
shall inure to the benefit of and be binding upon the respective successors of
the parties hereto; PROVIDED that this Agreement, including the representations
and warranties herein, may not be assigned by any Person without the prior
written consent of the other parties hereto.


      12.3 COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall for all purposes be deemed to be an original
and all of which shall constitute the same instrument.


      12.4 HEADINGS. The headings of the Articles, Sections and paragraphs of
this Agreement are inserted for convenience only and shall not be deemed to
constitute part of this Agreement or to affect the construction hereof.


      12.5 MODIFICATION AND WAIVER. No amendment, modification or alteration of
the terms or provisions of this Agreement shall be binding unless the same shall
be in writing and duly executed by the parties hereto, except that any of the
terms or provisions of this Agreement may be waived in writing at any time by
the Person which is entitled to the benefits of such waived terms or provisions.
No waiver of any of the provisions of this Agreement shall be deemed to or shall
constitute a waiver of any other provision hereof (whether or not 

                                       29
<PAGE>
similar). No delay on the part of either Person in exercising any right, power
or privilege hereunder shall operate as a waiver thereof.


      12.6 NO THIRD PARTY BENEFICIARY RIGHTS. Except as provided in the second
sentence of this Section 12.6, this Agreement is not intended to and shall not
be construed to give any Person (other than the parties signatory hereto) any
interest or rights (including, without limitation, any third Person beneficiary
rights) with respect to or in connection with any agreement or provision
contained herein or contemplated hereby. The directors, officers, shareholders
of the Original Partners and the New Partners, and of their respective
Affiliates, and the respective Affiliates of the Original Partners and the New
Partners are expressed third Person beneficiaries of the indemnification
provisions contained in Article X of this Agreement.


      12.7 EXPENSES. Except as otherwise provided in this Agreement, each Person
shall pay all costs and expenses incurred by them or on their behalf in
connection with this Agreement and the transactions contemplated hereby.


      12.8 NOTICE. Any notice, request, instruction or other document to be
given hereunder by any party hereto or any indemnified Person to any party or
indemnified Person shall be in writing and shall be sufficiently given if
delivered in person or sent by telecopier (with confirmation) or registered or
certified mail, postage prepaid, return receipt requested. As to any party, such
notice shall be addressed as follows:

             if to MCNIC Mobile Bay Gathering Company, to:
                    Attention:  Vice President
                    c/o Pipeline & Processing Group, Inc.
                    150 W. Jefferson, Suite 1700
                    Detroit, Michigan 48226

             if to PanEnergy Dauphin Island Company, to:
                   Attn:  Vice President - Offshore
                   5718 Westheimer, Suite 2000
                   Houston, Texas 77057

             if to CNG Main Pass Gas Gathering Corporation, to:
                   Attn:  Vice President
                   Park Ridge Center
                   Pittsburgh, Pennsylvania 15244-0746

             if to Centana Gathering Company, to:
                   Attn:  Vice President - Offshore
                   5718 Westheimer, Suite 2000
                   Houston, Texas 77057

                                       30
<PAGE>
             if to Coastal Dauphin Island Company, L.L.C., to:
                   Attn:  Vice President - Gulf Coast
                   Coastal Tower
                   Nine Greenway Plaza
                   Houston, Texas 77046-0995

             if to Dauphin Island Gathering Company, L.P., to:
                   Attn:  Mr. Keith Anderson
                   1400 Woodloch Forest Drive, Suite 200
                   The Woodlands, Texas 77380

             if to the Partnership, to Dauphin Island Gathering Company, L.P.,
             as Managing Partner:
                   Attn:  Mr. Keith Anderson
                   1400 Woodloch Forest Drive, Suite 200
                   The Woodlands, Texas 77380

             if to MPGC, to Centana Gathering Company,
             as Operator:
                   Attn:  Vice President - Offshore
                   5718 Westheimer, Suite 2000
                   Houston, Texas 77057


       or at such other address for a Person as shall be specified by like
notice, and such notice or communication shall be deemed to have been duly given
as of the date so delivered, mailed or sent by telecopier (with confirmation as
contemplated above if telecopied).


      12.9 GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the laws of the State of Texas without regard to its conflicts
of law rules that might refuse or permit the application of the law of another
jurisdiction.


      12.10 PUBLICITY. Except as otherwise required by applicable laws or
regulations, or the rules of any stock exchange on which the securities of a
Person or its Affiliates are listed, no Person hereto shall issue any press
release or make any other public statement, in each case relating to or
connected with or arising out of this Agreement or the matters contained herein,
without obtaining the prior approval of the other parties hereto to the contents
and the manner of presentation and publication thereof.


      12.11 SEVERABILITY. If any provision of this Agreement is unenforceable,
all other provisions of this Agreement shall nevertheless remain in full force
and effect so long as the economic or legal substance of the transactions
contemplated hereby is not affected in any manner materially adverse to any
party. Upon such determination that any provision is unenforceable, the parties
hereto shall negotiate in good faith to modify this Agreement so as to effect
the original intent of the parties as closely as possible in an acceptable
manner to the end that the transactions contemplated hereby are fulfilled.

                                       31
<PAGE>
      12.12 ENFORCEMENT. The parties hereto agree that the remedy at law for any
breach of this Agreement is inadequate and that should any dispute arise
concerning the transfer of the Main Pass Assets or any other matter hereunder,
this Agreement shall be enforceable in a court of equity by an injunction or a
decree of specific performance. Such remedies shall, however, be cumulative and
nonexclusive, and shall be in addition to any other remedies which the parties
hereto may have.

                          [NEXT PAGE IS SIGNATURE PAGE]

                                       32
<PAGE>

           IN WITNESS WHEREOF, each of the parties hereto has caused this
  Agreement to be executed on its behalf as of the date first above written.


                               Dauphin Island Gathering Partners, by its General
                               Partners in their capacity as partners and
                               individually:

                               Dauphin Island Gathering Company, L.P.
                               By:  OEDC, Inc., its General Partner

                               By:DOUGLAS H. KIESEWETTER
                               Name: DOUGLAS H. KIESEWETTER
                               Title:EXECUTIVE VICE PRESIDENT

                               MCNIC Mobile Bay Gathering Company

                               By:JOSEPH L. ROBERTS
                               Name:JOSEPH L. ROBERTS
                               Title: VICE PRESIDENT

                               PanEnergy Dauphin Island Company

                               By: BRAD D. REESE
                               Name:BRAD D. REESE
                               Title: VICE PRESIDENT

                               Main Pass Gas Gathering Company
                               by its General Partners in their capacity
                               as partners and individually

                               Centana Gathering Company

                               By: BRAD D. REESE
                               Name:BRAD D. REESE
                               Title: VICE PRESIDENT

                               Coastal Dauphin Island Company, L.L.C.

                               By:STEVEN R. ANDERSON
                               Name:STEVEN R. ANDERSON
                               Title:VICE PRESIDENT
<PAGE>
                               CNG Main Pass Gas Gathering Corporation

                               By: JAMES D. KEIFFER
                               Name: JAMES D. KEIFFER
                               Title:VICE PRESIDENT



       LIST OF EXHIBITS AND SCHEDULES

Exhibit A    -    MMBGC Affiliate Pipe
Exhibit B    -    Assignment  of  Contract  Rights and Bill of Sale
Exhibit C    -    Fifth     Amended    and    Restated Partnership Agreement
Exhibit D    -    Agreement Regarding Jurisdictionality
Exhibit E    -    Coastal  Form  of  Processing  Plant Option Agreement
Exhibit F    -    CNG Form of Processing  Plant Option Agreement
Exhibit G    -    Partnership and MPGC Financials 
Schedule 3.4 -    Partnership  Assets Not Reflected on Partnership Balance Sheet
Schedule 3.5 -    Partnership's Material Contracts
Schedule 3.6 -    Partnership Permits/Agreements
Schedule 3.7 -    Litigation - Partnership
Schedule 3.9 -    Certain  changes  since  Partnership Balance Sheet
Schedule 3.11-    Partnership Permitted Encumbrances
Schedule 4.4 -    MPGC  Assets Not  Reflected  on MGPC Balance Sheet
Schedule 4.5 -    MPGC Material Contracts
Schedule 4.6 -    MPGC Permits
Schedule 4.7 -    Litigation - MPGC
Schedule 4.9 -    Certain  changes  since MPGC Balance Sheet Date
Schedule 4.11-    MPGC Permitted Encumbrances
Schedule 4.13-    Main Pass Assets

                                                                    EXHIBIT 99.2

                                      FIFTH

                              AMENDED AND RESTATED

                          GENERAL PARTNERSHIP AGREEMENT


                                       FOR

                        DAUPHIN ISLAND GATHERING PARTNERS


                                     BETWEEN


                       MCNIC MOBILE BAY GATHERING COMPANY,


                     DAUPHIN ISLAND GATHERING COMPANY, L.P.


                        PANENERGY DAUPHIN ISLAND COMPANY


                            CENTANA GATHERING COMPANY


                     CNG MAIN PASS GAS GATHERING CORPORATION


                                       AND


                     COASTAL DAUPHIN ISLAND COMPANY, L.L.C.





                          DATED AS OF DECEMBER 31, 1996

<PAGE>

                                TABLE OF CONTENTS


                                   ARTICLE 1.
                            FORMATION OF PARTNERSHIP.........................  3
        1.1       FORMATION OF PARTNERSHIP...................................  3
        1.2       OWNERSHIP INTERESTS........................................  3
                  (a) INITIAL OWNERSHIP INTERESTS............................  4
                  (b) AFTER PAYOUT REVISIONS OF OWNERSHIP INTERESTS..........  4
                  (c) DEFINITION OF PAYOUT...................................  4
        1.3       PURPOSE OF PARTNERSHIP.....................................  5
        1.4       NAME OF PARTNERSHIP........................................  5
        1.5       PRINCIPAL PLACE OF BUSINESS................................  5

                                   ARTICLE 2.
                         RESPONSIBILITIES OF THE PARTIES.....................  6
        2.1       RESPONSIBILITIES OF THE PARTIES............................  6
        2.2       REGULATORY COVENANTS.......................................  6

                                   ARTICLE 3.
                   MANAGEMENT AND OPERATION OF THE PARTNERSHIP...............  7
        3.1       MANAGEMENT COMMITTEE.......................................  7
        3.2       ORGANIZATION AND DUTIES OF MANAGEMENT COMMITTEE............  7
        3.3       ACTION REQUIRING MAJORITY APPROVAL.........................  9
        3.4       ACTION REQUIRING SUPER MAJORITY APPROVAL................... 10
        3.5       ACTION REQUIRING EXTRAORDINARY APPROVAL.................... 12
        3.6       INDEMNIFICATION OF MANAGEMENT COMMITTEE MEMBERS............ 12
        3.7       MANAGING PARTNER........................................... 12
        3.8       REMOVAL OR RESIGNATION OF THE MANAGING PARTNER............. 13
        3.9       DUTIES OF THE MANAGING PARTNER............................. 15
        3.10      AUTHORIZATION.............................................. 18
        3.11      INDEMNIFICATION OF THE MANAGING PARTNER.................... 18
        3.12      THE MANAGING PARTNER'S LIABILITY........................... 19
        3.13      THE FINANCE PARTNER........................................ 19
        3.14      REMOVAL OR RESIGNATION OF THE FINANCE PARTNER.............. 19
        3.15      DUTIES OF THE FINANCE PARTNER.............................. 22
        3.16      INDEMNIFICATION OF THE FINANCE PARTNER..................... 22
        3.17      THE FINANCE PARTNER'S LIABILITY............................ 23
        3.18      EXCLUSION OR SUSPENSION OF VOTE............................ 23
        3.19      NO VETO RIGHTS............................................. 23

                                        i
<PAGE>

                                   ARTICLE 4.
                                  AMI PROJECTS............................... 24
        4.1       FACILITIES TO BE CONSTRUCTED OR ACQUIRED................... 24
        4.2       PROJECT PLANS.............................................. 24
        4.3       CONSTRUCTION/ACQUISITION BUDGETS AND APPROVALS............. 24
        4.4       COSTS AND PAYMENT.......................................... 26
        4.5       CONSTRUCTION............................................... 26
        4.6       PERMITS.................................................... 26
        4.7       INSPECTION AND TESTING..................................... 26
        4.8       CONSTRUCTION AND ACQUISITION OF FACILITIES IN THE AMI...... 27
        4.9       SOLE-RISK AMI PROJECTS..................................... 28
                  (a) DEFINITIONS............................................ 28
                  (b) MORATORIUM ON SOLE-RISK AMI PROJECTS................... 28
                  (c) PROPOSAL OF SOLE-RISK AMI PROJECT...................... 29
                  (d) SOLE-RISK NEW SYSTEM PROJECTS.......................... 29
                  (e) SOLE-RISK EXTENSION PROJECTS........................... 30
        4.10      NON-CONSENT................................................ 34

                                   ARTICLE 5.
                         CAPITAL CONTRIBUTIONS/FINANCING..................... 37
        5.1       CAPITAL CONTRIBUTIONS BY DIGC.............................. 37
        5.2       CAPITAL CONTRIBUTIONS BY MMBGC............................. 38
        5.3       CENTANA, CNG AND COASTAL CONTRIBUTIONS..................... 38
        5.4       CAPITAL CONTRIBUTIONS FOR VK 121 AND VK 124 EXTENSION 
                  AND PHASE I EXTENSION...................................... 38
        5.5       OTHER CONTRIBUTIONS........................................ 38
        5.6       FAILURE TO MAKE CONTRIBUTIONS.............................. 39
        5.7       SELF-INSURANCE CONTRIBUTIONS............................... 41

                                   ARTICLE 6.
                       OPERATING COSTS AND COMPENSATION OF
                     THE MANAGING PARTNER AND OTHER PARTNERS................. 41
        6.1       BUDGETS, APPROVALS AND AUTHORIZATIONS...................... 41
        6.2       BUSINESS PLAN.............................................. 43
        6.3       COSTS AND PAYMENT.......................................... 43
        6.4       PARTNERS' COOPERATION...................................... 43
        6.5       COMPENSATION OF THE MANAGING PARTNER....................... 43
        6.6       COMPENSATION OF THE FINANCE PARTNER........................ 44

                                       ii
<PAGE>

                                   ARTICLE 7.
                          ALLOCATIONS AND DISTRIBUTIONS...................... 45
        7.1       REVENUE DISTRIBUTION....................................... 45
        7.2       ALLOCATIONS OF PROFITS AND LOSSES.......................... 46
        7.3       TAX REVIEW SPECIAL ALLOCATIONS OF DEPRECIATION............. 49
        7.4       CURATIVE AMENDMENT......................................... 49
        7.5       SECTION 704(C)............................................. 50
        7.6       TRANSFERS.................................................. 50

                                   ARTICLE 8.
                                   ACCOUNTING................................ 50
        8.1       FISCAL YEAR................................................ 50
        8.2       BOOKS OF ACCOUNT........................................... 50
        8.3       CAPITAL ACCOUNTS........................................... 51
        8.4       SURVIVAL OF TAX PROVISIONS................................. 51
        8.5       AUDIT...................................................... 52
        8.6       ACCOUNTING PROCEDURES...................................... 52

                                   ARTICLE 9.
                            GATHERING SYSTEM CAPACITY........................ 52
        9.1       PARTNERSHIP OWNED CAPACITY................................. 52
        9.2       AFFILIATE COMMITMENT....................................... 52

                                   ARTICLE 10.
                              TERM AND TERMINATION........................... 53
        10.1      TERM....................................................... 53
        10.2      [INTENTIONALLY LEFT BLANK]................................. 53
        10.3      OTHER REASONS FOR DISSOLUTION.............................. 53
        10.4      WINDING UP................................................. 54
        10.5      RIGHT TO WITHDRAW.......................................... 56
        10.6      DEEMED DISTRIBUTION AND RECONTRIBUTION..................... 56

                                   ARTICLE 11.
                       OPTION AND PRIOR RIGHT TO PURCHASE.................... 57
        11.1      DISPOSITIONS............................................... 57
        11.2      TAG ALONG RIGHTS........................................... 59

                                   ARTICLE 12.
                                      TAXES.................................. 59
        12.1      TAXES...................................................... 59

                                       iii
<PAGE>

                                   ARTICLE 13.
                              INSURANCE AND LOSSES........................... 60
        13.1      INSURANCE.................................................. 60
        13.2      COST OF INSURANCE.......................................... 62
        13.3      INDEMNIFICATION OF PARTNERS................................ 62
        13.4      LOSS OF OR DAMAGE TO PARTNERSHIP PROPERTY.................. 62
        13.5      SELF INSURANCE............................................. 63

                                   ARTICLE 14.
                     INVOLUNTARY DISSOLUTION AND CONTINUANCE................. 63
        14.1      CONTINUANCE OF RELATIONSHIP................................ 63

                                   ARTICLE 15.
                                  MISCELLANEOUS.............................. 64
        15.1      LAWS AND REGULATIONS....................................... 64
        15.2      CONTROLLING LAW............................................ 64
        15.3      FORCE MAJEURE.............................................. 64
        15.4      NOTICES.................................................... 64
        15.5      CONFIDENTIALITY............................................ 66
        15.6      INURING CLAUSE............................................. 66
        15.7      DEFAULT.................................................... 66
        15.8      PARTITION OF PARTNERSHIP................................... 66
        15.9      TIME OF THE ESSENCE........................................ 67
        15.10     LIMITATION ON AUTHORITY.................................... 67
        15.11     ARBITRATION................................................ 67
        15.12     REPRESENTATION OF PARTNERS................................. 68
        15.13     SEVERABILITY............................................... 69
        15.14     REMEDIES................................................... 69
        15.15     EXHIBITS................................................... 69
        15.16     SPECIAL AND CONSEQUENTIAL DAMAGES.......................... 69
        15.17     COUNTERPARTS............................................... 70
        15.18     ENTIRE AGREEMENT........................................... 70
        15.19     AMENDMENT.................................................. 70

                                       iv
<PAGE>

                           FIFTH AMENDED AND RESTATED
                          GENERAL PARTNERSHIP AGREEMENT


                  THIS FIFTH AMENDED AND RESTATED GENERAL PARTNERSHIP AGREEMENT
("AGREEMENT") is made and entered into as of the 31st day of December, 1996 (the
"EFFECTIVE DATE"), by and among MCNIC MOBILE BAY GATHERING COMPANY, a Michigan
corporation ("MMBGC"), DAUPHIN ISLAND GATHERING COMPANY, L.P., a Texas limited
partnership, the general partner of which is OEDC, INC. ("DIGC"), PANENERGY
DAUPHIN ISLAND COMPANY, a Delaware corporation ("PDI"), CENTANA GATHERING
COMPANY, a Delaware corporation ("CENTANA"), CNG MAIN PASS GAS GATHERING
CORPORATION ("CNG"), a Delaware corporation and Coastal Dauphin Island Company,
L.L.C. ("COASTAL"), a Delaware limited liability company, all of such parties
for convenience being sometimes hereinafter referred to collectively as the
"PARTNERS" or individually as a "PARTNER," and Centana, CNG and Coastal being
sometimes hereinafter referred to collectively as the "NEW PARTNERS."

                              W I T N E S S E T H:

                  WHEREAS, DIGC and Enron Gas Gathering, Inc. ("EGGI") executed
the General Partnership Agreement for Dauphin Island Gathering Partners on
January 14, 1993 (the "ORIGINAL AGREEMENT"), creating between them a general
partnership under the laws of the State of Texas for the construction, ownership
and operation of a natural gas gathering system and related activities located
in the state and federal waters of Mobile Bay, offshore Alabama;

                  WHEREAS, on April 18, 1994, DIGC, EGGI and Tenneco Mobile Bay
Gathering Company, a Delaware corporation ("TMBGC") executed the Amended and
Restated General Partnership Agreement (the "FIRST RESTATED AGREEMENT") to amend
the terms of the Original Agreement, to admit TMBGC as a new partner and to
restate the amended terms and conditions on which the partnership governed by
the First Restated Agreement was to be conducted;

                  WHEREAS, in connection with the First Restated Agreement,
DIGC, EGGI and TMBGC executed that certain Contribution Agreement dated March
25, 1994, as amended by the First Amendment to Contribution Agreement dated as
of December 31, 1994;

                  WHEREAS, DIGC, EGGI and TMBGC executed the First Amendment to
Amended and Restated Partnership Agreement on December 31, 1994, to amend
Sections 8.1(g), (k), and (m) of the First Restated Agreement;

<PAGE>

                  WHEREAS, pursuant to separate Agreements of Purchase and Sale
(the "PURCHASE AGREEMENTS"), each dated January 31, 1996, but effective as of
October 1, 1995, MMBGC acquired ninety-six percent (96%) of the interest of DIGC
and all of the interest of EGGI in the partnership governed by the First
Restated Agreement, and Pipeline & Processing Group, Inc., the parent of MMBGC
("P&PG") acquired all of the shares of TMBGC;

                  WHEREAS, contemporaneously with the purchase of the shares of
TMBGC by P&PG, TMBGC was merged into MMBGC with MMBGC as the surviving
corporation;

                  WHEREAS, in connection with the acquisition of the shares of
TMBGC, an election was made under Section 338 of the Internal Revenue Code of
1986, as amended, to treat the purchase of the stock of TMBGC as an asset
purchase for tax purposes; and

                  WHEREAS, on February 28, 1996, MMBGC and DIGC amended the
terms of the First Restated Agreement to admit MMBGC as a new Partner and to
restate the amended terms and conditions on which the partnership governed by
the Second Restated Agreement was to be conducted pursuant to the Second Amended
and Restated Partnership Agreement (the "SECOND RESTATED AGREEMENT");

                  WHEREAS, pursuant to that certain Agreement of Purchase and
Sale dated as of June 30, 1996 (the "PDI PURCHASE AGREEMENT"), PDI acquired a
thirty-five percent (35%) interest in the partnership governed by the Second
Restated Agreement from MMBGC;

                  WHEREAS, on June 30, 1996, MMBGC, DIGC and PDI amended the
terms of the Second Amended and Restated Partnership Agreement to admit PDI as a
new Partner and to restate the amended terms and conditions on which the
partnership governed by the Third Restated Agreement was to be conducted
pursuant to the Third Amended and Restated General Partnership Agreement (the
"THIRD RESTATED AGREEMENT");

                  WHEREAS, pursuant to the PDI Purchase Agreement, PDI exercised
its option to acquire an additional five percent (5%) Ownership Interest in the
partnership governed by the Third Restated Agreement, effective as of July 1,
1996;

                  WHEREAS, on July 1, 1996, MMBGC, DIGC and PDI amended the
terms of the Third Amended and Restated General Partnership Agreement to reflect
the acquisition of the additional five percent (5%) interest in the partnership
governed by the Third Restated Agreement by PDI and to reinstate the amended
terms and conditions on which the partnership governed by the Fourth Restated
Agreement was to be conducted pursuant to the Fourth Amended and Restated
General Partnership Agreement, as

                                        2
<PAGE>

subsequently amended by the DIGC Purchase Agreement (the "FOURTH RESTATED
AGREEMENT");

                  WHEREAS, by a Bill of Sale and Assignment dated effective as
of 7:01 a.m. Houston time, on December 31, 1996, MMBGC conveyed to DIGC a
0.407406% Ownership Interest in the Partnership governed by the Fourth Restated
Agreement (the "DIGC ASSIGNMENT");

                  WHEREAS, pursuant to that certain Partnership Contribution
Agreement dated December 13, 1996 (the "CONTRIBUTION AGREEMENT"), Main Pass Gas
Gathering Company agreed to contribute the assets described in EXHIBIT A-2
hereto (the "MAIN PASS ASSETS") to the Partnership in exchange for admission of
Centana, CNG and Coastal to the
Partnership;

                  WHEREAS, MMBGC, DIGC, PDI, Centana, CNG and Coastal desire to
amend the terms of the Fourth Restated Agreement to reflect the acquisition by
DIGC of the general partnership interest described in the DIGC Assignment, the
acquisition of the Main Pass Assets, admit Centana, CNG and Coastal as New
Partners, dilute the Ownership Interest of the existing Partners, and restate
the amended terms and conditions on which the Partnership is to be conducted.

                  NOW, THEREFORE, in consideration of the terms and mutual
covenants set forth herein, the parties agree as follows:

                                   ARTICLE 1.
                            FORMATION OF PARTNERSHIP

        1.1 FORMATION OF PARTNERSHIP. The Partners hereby agree to and do
herewith form a general partnership (the "PARTNERSHIP") under the Texas Revised
Partnership Act (the "PARTNERSHIP ACT") for the limited purposes and scope set
forth herein. Each Partner's interest in the Partnership shall be deemed
personal property for all purposes herein. All real and other property owned by
the Partnership shall be deemed owned by the Partnership as an entity, and no
Partner shall individually have any direct ownership in such property.

        1.2 OWNERSHIP INTERESTS. Subject to the provisions of this Agreement,
the interests of the Partners in the profits, gains and losses of the
Partnership ("OWNERSHIP INTERESTS") shall be as follows:

                                        3
<PAGE>

                  (a) INITIAL OWNERSHIP INTERESTS. The Initial Ownership
        Interests of the Partners in the Partnership shall be as follows:

               DIGC            1.0000%

               MMBGC          34.5556%

               PDI            23.7038%

               Centana        13.5802%

               CNG            13.5802%

               Coastal        13.5802%

               (b) AFTER PAYOUT REVISIONS OF OWNERSHIP INTERESTS. Upon the
        occurrence of "Payout" (hereinafter defined) with respect to a Partner,
        the Ownership Interest of such Partner shall be reduced by such
        Partner's proportionate share, based on its Ownership Interest, of the
        "DIGC After Payout Interest" (hereinafter defined) and the Ownership
        Interest of DIGC shall be increased by an amount corresponding to such
        reduction. The term "DIGC AFTER PAYOUT INTEREST" shall mean an interest
        equal to 11.1500%. For purposes of clarification, the Ownership
        Interests of the following Partners after Payout as to such Partner
        shall be as follows:

               MMBGC          31.0127
               PDI            21.2736
               Centana        12.1879
               CNG            12.1879
               Coastal        12.1879

               (c) DEFINITION OF PAYOUT. For purposes of this Agreement,
        "PAYOUT" shall occur as to a Partner on the last day of the earliest
        calendar month during which:

                      (1) the aggregate cash distributions which such Partner
               shall have actually received from the Partnership pursuant to
               ARTICLE 7 of this Agreement, discounted back from the respective
               dates such cash distributions were made to such Partner to
               December 31, 1996, (the "DISCOUNT DATE") at a monthly rate equal
               to 0.874161% shall equal:

                                        4
<PAGE>

                      (2) the sum of (i) the amount set forth opposite such
               Partner's name in SCHEDULE 1.2 (for such Partner the "PAYOUT
               BASELINE") plus (ii) aggregate capital contributions made by such
               Partner to the Partnership on and after the Discount Date
               discounted back from the respective dates such capital
               contributions were made by such Partner to the Discount Date at a
               monthly rate equal to 0.874161%.

        The occurrence of Payout shall not entitle DIGC to any of the then
existing Capital Account balances of the Partner with respect to which Payout
has occurred.

        Contributions and distributions with respect to any Sole-Risk AMI
Project shall not be taken into account for purposes of the calculations of this
SECTION 1.2(C), but contributions and distributions with respect to any
Non-Consent Project under SECTION 4.10 shall be taken into account for purposes
of the calculations of this SECTION 1.2(C).

        1.3 PURPOSE OF PARTNERSHIP. The Partnership is formed for the limited
purpose of constructing, owning and operating (a) the gathering system located
in the state and federal waters of Mobile Bay, offshore Alabama, which gathering
system is more particularly described in EXHIBIT A-1 hereto (the "DIGS") and the
gathering system located in the federal waters of Main Pass Area, East Addition,
offshore Louisiana, which gathering system is more particularly described in
EXHIBIT A-2 hereto (the "MAIN PASS SYSTEM") and (b) any expansions or
modifications of such gathering system or systems and any other gathering
systems or facilities constructed or acquired by the Partnership under ARTICLE 4
within the AMI (all of the foregoing is referred to herein as the "GATHERING
SYSTEM"). Without otherwise limiting the foregoing, the Partners agree that the
purpose of the Partnership shall not include, (a) any gas processing activities,
or (b) the right or authority to obtain any financing that is recourse to the
Partners.

        1.4 NAME OF PARTNERSHIP. The name of the Partnership shall be Dauphin
Island Gathering Partners. The Partners shall file the required assumed name
certificates. The business and affairs of the Partnership shall be conducted
solely under the name of Dauphin Island Gathering Partners, and such name shall
be used at all times in connection with the business and affairs of the
Partnership.

        1.5 PRINCIPAL PLACE OF BUSINESS. The city in which the principal place
of business of the Managing Partner is located shall be the principal place of
business of the Partnership.

                                        5
<PAGE>

                                   ARTICLE 2.
                         RESPONSIBILITIES OF THE PARTIES

        2.1 RESPONSIBILITIES OF THE PARTIES. Each Partner is responsible for
procuring any and all authorizations which it might individually require for its
participation in the Partnership. The authority of the Partners to conduct
business on behalf of the Partnership is limited to the authority expressly
granted under this Agreement. The Partners represent and warrant that each has
the legal authority to and is not prohibited from entering into the Partnership
and pursuing the business thereof. Except as provided in SECTION 4.8, each
Partner may own and operate and invest in any natural gas gathering system not
owned or operated by the Partnership wherever located, compete with the other
Partners and the Partnership, and engage in and possess business interests in
ventures of any kind for such Partner's exclusive benefit, and the other
Partners shall have no interest therein by virtue of this Agreement.

        2.2    REGULATORY COVENANTS.

               (a) Each Partner hereby agrees that it will not, and will use
        reasonable efforts to cause its Affiliates not to take any action where
        such action will cause the Gathering System or any portion or extension
        thereof or any of its rates and services to be regulated by the Federal
        Energy Regulatory Commission ("FERC") under the Natural Gas Act of 1938.

               (b) As used in this Agreement, the term "AFFILIATE" shall mean
        any person that directly or indirectly, through one or more
        intermediaries, controls, manages or is controlled or managed by or is
        under common control with any Partner. The term "PERSON" shall include,
        without limitation, an individual, a corporation, a partnership, an
        association, a joint stock company and/or a trust. The term "CONTROL"
        (including the terms "CONTROLS", "CONTROLLED BY" and "UNDER COMMON
        CONTROL WITH") means, (1) with respect to a corporation, the ownership
        or other control of securities to which are attached more than fifty
        percent (50%) of the voting interest of all securities issued by the
        corporation, (2) with respect to a partnership, the ownership of more
        than fifty percent (50%) interest in the partnership, and (3) with
        respect to any other person, the possession, direct or indirect, of the
        power to direct or cause the direction of the management and policies of
        such person, by contract or otherwise.

                                        6
<PAGE>

                                   ARTICLE 3.
                   MANAGEMENT AND OPERATION OF THE PARTNERSHIP

        3.1    MANAGEMENT COMMITTEE.

               (a) The management of the Partnership shall be by a committee of
        the representatives of the Partners (the "MANAGEMENT COMMITTEE") which
        shall have general discretion to manage the affairs, determine and
        approve the overall objectives, policies, procedures, methods and
        actions of the Partnership, including, but not limited to, the authority
        to perform those acts specifically enumerated herein, and the exclusive
        right to make all major policy and business development decisions. No
        Partner shall have authority to act for, or to assume any obligation or
        responsibility on behalf of the Partnership without the prior written
        approval of the Management Committee unless otherwise specifically
        provided herein.

               (b) The day-to-day business of constructing, operating, and
        maintaining the Gathering System will be delegated to the Managing
        Partner under the subsequent provisions of this ARTICLE 3.

        3.2    ORGANIZATION AND DUTIES OF MANAGEMENT COMMITTEE.

               (a) The members of the Management Committee shall consist of one
        representative of each Partner. Each Partner shall from time to time
        designate, by written notice to the other Partners, its representative
        to serve on the Management Committee, and the representative so
        designated shall be authorized to vote the Ownership Interest of the
        appointing Partner. By like notice, each Partner may designate two
        alternate representatives, either of whom shall have authority to act in
        the absence of its representative. Any Partner may at any time, by
        written notice to the other Partners and to the Partnership, remove its
        representative or alternate representative(s) on the Management
        Committee and designate a new representative or alternate(s). The
        Management Committee representative of each Partner shall be authorized
        by such Partner to take any and all actions with respect to the
        Partnership and to act on such Partner's behalf with respect to the
        Partnership. The resignation or removal of a member of the Management
        Committee shall not invalidate any act of such member taken prior to the
        giving of written notice of his or her resignation or removal.

               (b) The representative of the Managing Partner on the Management
        Committee shall be the Chairman of the Management Committee.

                                        7
<PAGE>

               (c) Meetings of the Management Committee shall be held at the
        principal offices of the Partnership, or such other places as may be
        agreed to by its members. The Chairman shall preside at all meetings of
        the Management Committee and shall schedule such meetings of the
        Management Committee as are necessary to resolve current items of
        business with advance written notice of at least two (2) Business Days
        (hereinafter defined), provided, however, that if any item to be
        resolved at the meeting requires Super Majority Approval or
        Extraordinary Approval, then the meeting shall be scheduled with at
        least five (5) Business Days' advance written notice. A "BUSINESS DAY"
        shall mean any day which is not a Saturday, a Sunday, or a holiday on
        which national banking associations in the State of Texas are closed.
        Any notice given under this Section shall include the agenda for the
        meeting. Any Partner may, with at least one Business Day's advance
        written notice add items to the agenda for the meeting, provided that
        such items do not require Super Majority or Extraordinary Approval.
        Unless agreed to otherwise by all of the members of the Management
        Committee, only matters on the agenda provided with the notice of the
        meeting (or timely noticed by a Partner) shall be considered at the
        meeting. Meetings may be held by conference telephone or similar
        communications equipment by means of which all persons participating in
        the meeting can clearly hear each other simultaneously. Any Partner may
        call a meeting of the Management Committee by notifying the Chairman of
        such request and including with such notice any agenda items to be acted
        upon at such meeting. The Chairman shall be responsible for maintaining
        and distributing to all Partners written minutes of all meetings.
        Notwithstanding the foregoing, the Management Committee shall meet at
        least once per calendar quarter on a date mutually agreed to by all
        Partners, or, absent such agreement, on the fifth Business Day of the
        first month of such calendar quarter.

               (d) Members of the Management Committee, and/or their designated
        alternates, may attend meetings and such member (or alternate, if the
        member is not available) may vote either in person, by telephone or
        other similar communications (confirmed in writing) or through duly
        authorized powers of attorney. With respect to each item of business, a
        quorum of the Management Committee shall consist of representatives of
        two or more Partners that are not Affiliates with more than fifty
        percent (50%) of the Ownership Interests (excluding any Partners whose
        voting rights have been suspended at such time or are excluded from
        voting pursuant to the express provisions hereof).


                                        8
<PAGE>

               (e) Actions taken by representatives of the required sum of the
        percentage Ownership Interests of the Partners, as specified for
        particular actions herein, at a Management Committee meeting at which a
        quorum is present, and for which notice either is given, or is waived
        before or after such meeting by all Partners, shall authorize action by
        the Partnership. Each representative shall have a vote equal to the
        Ownership Interest percentage of the Partner he or she represents.

        3.3 ACTION REQUIRING MAJORITY APPROVAL. Subject to SECTION 3.19, the
approval of two or more members of the Management Committee representing in
excess of fifty percent (50%) of the Ownership Interests which are not excluded
or suspended from voting under a specific provision of this Agreement, but
provided that the approval of two Affiliated members shall not suffice without
the approval of at least one additional non-Affiliated member ("MAJORITY
APPROVAL") shall be necessary before any of the following actions can be taken
on behalf of the Partnership:

               (a) Approving any Project Plan and budgets therefor, or revisions
        thereto, proposed by the Managing Partner for any AMI Project, where the
        total amount budgeted for such Project Plan, as such budget may be
        revised, does not exceed $5 million.

               (b) Selling, transferring, or leasing any of the assets of the
        Partnership, provided that the aggregate fair market value of such
        assets does not exceed $5 million. If such sale, transfer, or lease is
        to an Affiliate of a Partner, the vote of such Partner shall not be
        taken into account.

               (c) Exercising any of the other powers granted to the Management
        Committee under SECTION 3.1 or other provisions hereof which (1) are not
        specifically enumerated elsewhere herein as requiring less or more than
        a Majority Approval, (2) not delegated to the Managing Partner under
        SECTION 3.9 or (3) not delegated to the Finance Partner under SECTION
        3.15.

               (d) Selecting a nationally recognized firm of independent
        certified public accountants to audit the books of account of the
        Partnership as provided by SECTION 8.2 and selecting outside attorneys
        to represent the Partnership (except as provided in SECTION 3.9).

               (e) Selecting from time to time the bank or banks in which the
        funds of the Partnership shall be deposited and held by the Finance
        Partner, and approving the investment of available funds.

                                        9
<PAGE>

               (f) Approving contracts with vendors for goods or services
        involving more than $100,000 during the life of the contract or more
        than $20,000 during any one month.

               (g) Approving the initiation of litigation or settlement of
        disputes involving claims (1) of the Partnership against a third party
        which are in excess of $25,000 (including attorneys fees of the
        Partnership) or (2) of the Partnership against a Partner (provided that
        in the event of a proposed action against a Partner the proposed
        defendant Partner shall not be entitled to vote) and approving the
        employment of all attorneys representing the Partnership in such
        matters.

               (h) Determining the frequency, form and nature of reports
        required from contractors, the Managing Partner and the Finance Partner
        not otherwise specifically provided for herein.

               (i) Approving any applications for or the acceptance of any
        necessary regulatory approvals with the exception of such regulatory
        approval for which Super Majority Approval is required under SECTION
        3.4(D).

               (j) Approving, consistent with ARTICLE 12, all tax policy matters
        regarding the Partnership, including, but not limited to, elections
        relating to state and federal income taxes, preparation and filing of
        Partnership returns and, subject to EXHIBIT D, the handling of and
        participation in tax audits conducted by any governmental entity.

               (k) Approving any contract or agreement with any Affiliate of a
        Partner; provided, however, the vote of the Partner whose Affiliates are
        the counter parties shall be excluded in determining the requisite
        approval.

               (l) Changing the amount of coverage under any insurance policy
        and determining the amount of coverage under SECTION 13.1(D).

        3.4 ACTION REQUIRING SUPER MAJORITY APPROVAL. Subject to SECTION 3.19,
the approval of two or more members of the Management Committee representing
seventy-five (75%) or more of the Ownership Interests which are not excluded or
suspended from voting under a specific provision of this Agreement, but provided
that the approval of two Affiliated members shall not suffice without the
approval of at least one additional nonAffiliated member ("SUPER MAJORITY
APPROVAL"), shall be necessary before any of the following actions can be taken
on behalf of the Partnership:

                                       10
<PAGE>

               (a) Approving any Project Plan and budgets therefor, or revisions
        thereto proposed by the Managing Partner for any AMI Project, where the
        total amount budgeted for such Project Plan, as such budget may be
        revised, exceeds $5 million.

               (b) Except as provided in SECTION 3.5(D), selling, transferring,
        or leasing any of the assets of the Partnership with an aggregate fair
        market value in excess of $5 million. If such sale, transfer, or lease
        is to an Affiliate of a Partner, the vote of such Partner shall not be
        taken into account.

               (c) Approving any interim and permanent financing agreements that
        are non-recourse to the Partners and the Partnership and any amendments
        or restructuring thereof, and mortgaging or pledging any of the material
        assets of the Partnership in connection therewith.

               (d) Approving any applications to or filings with FERC or the
        acceptance of any regulatory orders pertaining to jurisdictionality of
        all or any portion of the Partnership's assets.

               (e) Approving an Operating Budget pursuant to ARTICLE 6.

               (f) Approving (1) the general form of gathering agreements for
        use by the Managing Partner in connection with the Gathering System,
        which shall be in substantially the form of EXHIBIT E hereto, which
        shall establish both terms of service (including credit requirements)
        and rates that are reasonable and not unduly discriminatory among
        producers shipping gas through the Gathering System, and which shall be
        set without regard to a Partner or a Partner's Affiliates' marketing or
        gas purchase activities; (2) a change in the Partnership's existing gas
        curtailment policy and amendments thereto; and (3) any proposals by the
        Managing Partner for deviations from such agreements beyond those
        allowed by SECTION 3.9(B).

               (g) Consenting to certain Dispositions as provided in SECTION
        11.1, but with the Ownership Interest of the Selling Partner to be
        excluded from the vote.

               (h) Removing the Managing Partner and selecting a new Managing
        Partner pursuant to SECTION 3.8.

               (i) Removing the Finance Partner and selecting a new Finance
        Partner pursuant to SECTION 3.14.

                                       11
<PAGE>

        3.5 ACTION REQUIRING EXTRAORDINARY APPROVAL. Subject to SECTION 3.19,
the approval of two or more members of the Management Committee representing
eighty-five percent (85%) or more of the Ownership Interests which are not
excluded or suspended from voting under a specific provision of this Agreement,
but provided that the approval of two Affiliated members shall not suffice
without the approval of at least one additional nonAffiliated member
("EXTRAORDINARY APPROVAL"), shall be necessary before any of the following
actions can be taken on behalf of the Partnership:

               (a) Approving the undertaking by a Partner or an Affiliate of a
        Partner of a project outside of the Partnership that is prohibited by
        the terms of SECTION 4.8.

               (b) Admitting new partner(s), other than as a result of a
        Disposition.

               (c) A merger or consolidation of the Partnership with another
        entity.

               (d) A sale of all of the assets of the Partnership or a sale of a
        portion of the assets of the Partnership representing substantially all
        the market value of the assets of the Partnership.

        3.6 INDEMNIFICATION OF MANAGEMENT COMMITTEE MEMBERS. THE PARTNERSHIP
SHALL DEFEND, INDEMNIFY, HOLD HARMLESS, RELEASE AND DISCHARGE THE MEMBERS OF THE
MANAGEMENT COMMITTEE, INCLUDING THE ALTERNATES, AND MEMBERS OF ANY COMMITTEE
ESTABLISHED BY THE MANAGEMENT COMMITTEE, AGAINST ALL ACTIONS, CLAIMS, DEMANDS,
COSTS AND LIABILITIES ARISING OUT OF THE ACTS (OR FAILURE TO ACT) OF ANY SUCH
PERSONS IN GOOD FAITH WITHIN THE SCOPE OF THEIR AUTHORITY IN THE COURSE OF THE
PARTNERSHIP'S BUSINESS, EVEN IF CAUSED BY THE SOLE, JOINT,CONTRIBUTORY AND/OR
COMPARATIVE NEGLIGENCE, STRICT LIABILITY AND/OR OTHER FAULT, OTHER THAN GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT, OF SUCH MEMBERS OR ALTERNATES, AND SUCH
PERSONS SHALL NOT BE LIABLE FOR ANY OBLIGATIONS, LIABILITIES OR COMMITMENTS
INCURRED BY OR ON BEHALF OF THE PARTNERSHIP AS A RESULT OF ANY SUCH ACTS OR
FAILURE TO ACT FOR WHICH THEY ARE INDEMNIFIED.

        3.7 MANAGING PARTNER. The day-to-day operations of the Partnership and
the Gathering System shall be administered by a managing partner, which shall be
a Partner (the "MANAGING PARTNER"). DIGC is designated as the initial Managing
Partner.

                                       12
<PAGE>

        3.8 REMOVAL OR RESIGNATION OF THE MANAGING PARTNER. The Managing Partner
may be discharged of its powers, duties and responsibilities as the Managing
Partner and terminated as follows:

               (a) The Management Committee (without the participation of the
        member representing the Managing Partner or its Affiliates) may remove
        the Managing Partner if:

                      (1) the Managing Partner becomes insolvent or unable to
               pay its debts as they mature, makes an assignment for the benefit
               of creditors, commits an act of bankruptcy, or seeks relief under
               laws providing for the relief of debtors;

                      (2) a receiver is appointed for the Managing Partner or
               for substantially all of its property or affairs; or

                      (3) the Managing Partner commits a breach of a provision
               of this Agreement that if not cured is reasonably likely to
               result in a material economic loss to the Partnership and fails
               to cure the breach within ten (10) business days after written
               notice from the Partnership of the breach (or if such breach
               cannot reasonably be cured with such ten (10) day period, the
               Managing Partner fails to commence remedial action to cure such
               breach within such ten (10) day period or fails thereafter to
               continue diligent prosecution of such cure).

               If a petition for relief under the federal bankruptcy laws is
        filed by or against the Managing Partner, and if a federal bankruptcy
        court prevents the removal of the Managing Partner, the Management
        Committee (without the participation of the member representing the
        Managing Partner or its Affiliates) shall operate and manage the
        Gathering System until the Managing Partner has elected to reject or
        assume this Agreement under the Bankruptcy Code. An election by the
        Managing Partner as a debtor-in-possession or by a trustee in bankruptcy
        to reject this Agreement shall be deemed to be a resignation by the
        Managing Partner without any action by the Management Committee.

               The Managing Partner shall be deemed to have waived and does
        hereby waive any right to arbitrate, litigate, or otherwise contest
        removal pursuant to this SECTION 3.8(A) under SECTION 15.11 or
        otherwise, but shall not be deemed to have waived the right to
        arbitrate, litigate, or otherwise contest claims for wrongful or
        improper removal as a result of such removal.

                                       13
<PAGE>

               (b) The Managing Partner shall be deemed to have resigned if (1)
        the Ownership Interest of the Managing Partner and its Affiliates as
        redetermined pursuant to SECTION 1.2(A) is reduced by fifty percent
        (50%) or more (other than a reduction resulting from the occurrence of
        Payout) during the time period it is acting as the Managing Partner (in
        a single transaction or in a series of transactions), (2) if DIGC is the
        Managing Partner, DIGC sells any portion of its Ownership Interest to
        any non-Affiliate prior to the occurrence of the last Payout to occur,
        (3) a reduction of the Managing Partner's Ownership Interest pursuant to
        SECTION 5.6 occurs, (4) a Change of Control occurs with respect to the
        Managing Partner, (5) any of the events described in SECTION 10.3(A),
        10.3(B), 10.3(C) OR 10.3(D) occur with respect to the Managing Partner,
        or (6) the Managing Partner withdraws from the Partnership. A "CHANGE OF
        CONTROL" shall mean (x) with respect to DIGC, either (1) the failure of
        any two of any of R. Keith Anderson, Douglas H. Kiesewetter or David
        Strassner to be actively involved as the management of and in the
        operation of the general partner of DIGC to substantially the same
        degree as they are presently involved, or (2) the current ownership
        interest of two or more of R. Keith Anderson, Douglas H. Kiesewetter or
        David Strassner in Offshore Energy Development Corporation, which is
        currently 16.39% of the issued and outstanding shares of common voting
        stock, shall be reduced by seventy-five percent (75%) or more ("DIGC
        CHANGE OF CONTROL") except that under no circumstance shall the death of
        two or more of Douglas H. Kiesewetter, R. Keith Anderson and David
        Strassner constitute a DIGC Change of Control, and (y) with respect to
        any other Partner a change of more than fifty percent (50%) (in a single
        transaction or series of transactions) in (i) the direct ownership of
        such Partner (other than a transfer to an Affiliate), or (ii) the
        ownership of an entity that directly or indirectly owns such Partner as
        its principal asset (other than a transfer to an Affiliate). Promptly
        after the occurrence of any of such events, the Management Committee
        (without the participation of the member representing the removed
        Managing Partner or its Affiliates) shall provide to the Managing
        Partner a written notice which shall state the name of the successor
        Managing Partner and the date on which the successor Managing Partner
        will assume the responsibilities of the Managing Partner under this
        Agreement. Such resignation shall become effective on the date that the
        successor Managing Partner assumes the duties of the Managing Partner.

               (c) DIGC may be removed as the Managing Partner without cause on
        the earlier of (1) the last Payout to occur or (2) February 28, 2003.

                                       14
<PAGE>

               (d) The Managing Partner, substantially contemporaneously with
        the submission to the Management Committee of any Operating Budget, may
        resign its duties as the Managing Partner by written notice to the
        Management Committee. The resignation shall not become effective until
        the successor Managing Partner assumes the duties and obligations of the
        Managing Partner, which the Partners shall cause to occur not later than
        one hundred twenty (120) days after the submission by the Managing
        Partner of its resignation.

               (e) In the event the Managing Partner is removed or resigns
        pursuant to this SECTION 3.8, the Managing Partner shall submit to the
        Management Committee a final accounting of its operations under this
        Agreement. At the request of the Management Committee, the departing
        Managing Partner shall take an inventory of all materials relating to
        the Gathering System. The departing Managing Partner shall deliver to
        the successor Managing Partner all records, reports and data that are in
        its possession as the Managing Partner. Upon the delivery of such
        records, reports and data, the departing Managing Partner shall be
        released and discharged from, and the successor Managing Partner shall
        assume, all duties and obligations of the Managing Partner under this
        Agreement; provided that any liability of the departing Managing Partner
        that accrued prior to the effective date of the change of the Managing
        Partner shall, notwithstanding the release or discharge of the departing
        Managing Partner, continue to remain a liability of the departing
        Managing Partner. The former Managing Partner may retain copies of all
        such records, reports and data as the former Managing Partner may
        require, which copies will be prepared at the expense of the former
        Managing Partner.

               (f) If the Managing Partner is removed or resigns pursuant to
        this SECTION 3.8, the Management Committee shall select a successor
        Managing Partner by Super Majority Approval. The vote of the member of
        the Management Committee representing the Partner that was removed as
        the Managing Partner shall be excluded if such member does not vote or
        such member only votes for such removed Managing Partner to succeed
        itself.

        3.9 DUTIES OF THE MANAGING PARTNER. All of the Managing Partner's duties
shall be performed pursuant to an approved budget as provided in ARTICLE 6. The
Managing Partner will actively manage and conduct the day-to-day business of the
Partnership, devoting appropriate time and talents to such management so as to
conduct the business of the Partnership in a good and businesslike manner and in
accordance with good and prudent practice within the industry. In connection
therewith, the Managing Partner shall 
                                       15
<PAGE>

provide supervisory, administrative and technical services to the Partnership
and shall perform such services with the same degree of diligence and care that
it would exercise if the Partnership were owned solely by the Managing Partner.
Unless otherwise specified in this Agreement, or absent express contrary
direction from the Management Committee, the Managing Partner shall have the
responsibility and authority, without the prior or subsequent approval of the
Management Committee, to take or cause to be taken the following actions for and
on behalf of the Partnership:

               (a) Perform the day-to-day operations of the Partnership,
        including overseeing the operation and maintenance of the Gathering
        System and overseeing all construction activities.

               (b) Negotiate and execute gathering agreements with rates as
        approved by the Management Committee and in the form and under the terms
        of service substantially as approved by the Management Committee under
        SECTION 3.4(F) under which the Partnership will gather gas.

               (c) Obtain all permits, certificates and licenses necessary for
        the operation and maintenance of the Gathering System, and perform the
        administrative functions of the Partnership, including, without
        limitation, providing legal, accounting (in accordance with ARTICLE 8),
        engineering, planning, budgeting, reporting and other technical
        services, and maintain the records of the Partnership.

               (d) Perform or cause to be performed all necessary meter reading
        and chart calculations.

               (e) Protect and preserve the title and interests of the
        Partnership with respect to the Gathering System and other assets owned
        by the Partnership.

               (f) Enter into pipeline design and construction contracts and
        purchase pipe, equipment, rights-of-way and easements for any AMI
        Project pursuant to SECTION 4.5.

               (g) Negotiate, enter into and supervise the performance of
        contracts other than those contemplated in SECTIONS 3.9(B) and 3.9(F),
        and amendments thereto with third parties as may be necessary,
        appropriate or advisable in furtherance of the purposes of the
        Partnership business.

                                       16
<PAGE>

               (h) Attempt in good faith to obtain in any agreement, contract or
        other obligation of the Partnership, other than gathering agreements,
        provisions limiting the claims of all parties to such instruments to the
        assets of the Partnership and expressly waiving any such rights of such
        parties to proceed against the Partners individually.

               (i) Prepare and timely make such filings with any governmental
        authority as may be required to gather gas through the Gathering System.

               (j) Maintain the assets of the Partnership in good order and
        repair.

               (k) Prepare and furnish to governmental regulatory bodies all
        reports, statements and information that they may reasonably request or
        to which they are legally entitled concerning the Gathering System or
        the Partnership.

               (l) Execute documents requiring execution by the Partnership
        (both those requiring approval of the Management Committee and those not
        requiring approval).

               (m) Initiate, defend, negotiate and otherwise handle claims
        against the Partnership or a Partner, the Managing Partner, the Finance
        Partner or other person or entity to be indemnified by the Partnership
        or claims of the Partnership against third parties, where such claims
        (including attorneys' fees to be incurred by the Partnership) are less
        than $25,000 in value (including approving employment of all attorneys
        representing the Partnership in such matters).

               (n) In conjunction with the Finance Partner, prepare and issue
        invoices and monitor the status of payment of invoices for the
        Partnership and make cash calls on the Partners.

               (o) Perform all gas control activities necessary for gas to flow
        through the Gathering System in accordance with the gathering,
        interconnect and operational balancing agreements entered into or
        assumed by the Partnership.

               (p) In the event of, or reasonable anticipation of, any
        occurrence or condition which might (1) threaten life, property or the
        environment, (2) render the Gathering System incapable of continuous
        operation, (3) jeopardize the investment of the Partnership in the
        Gathering System, or (4) if required 

                                       17
<PAGE>

        in order to comply with law or an order of a governmental authority with
        jurisdiction over the Gathering System, the Managing Partner shall take
        such steps and incur such expenses and costs as in its reasonable
        opinion are required to deal with such emergency or requirement without
        being subject to the monetary spending limits imposed on the Managing
        Partner herein. The Managing Partner shall report such an emergency or
        requirement to the Management Committee as promptly as possible.

               (q) Within sixty (60) days after the end of the calendar year,
        make available information necessary to prepare and file all partnership
        tax returns.

               (r) Prepare capital and operating budgets pursuant to ARTICLE 4
        AND SECTION 6.1.

               (s) Perform such other acts reasonably necessary, appropriate or
        advisable to carry out the Managing Partner's duties under this
        Agreement to the extent that such acts are not matters to be voted on by
        the Management Committee as described in SECTIONS 3.3, 3.4 OR 3.5 or
        other provisions hereof or matters delegated to the Finance Partner.

        3.10 AUTHORIZATION. Subject to the express restrictions and limitations
set forth in this Agreement, the Partnership authorizes the Managing Partner to
perform any and every act and duty and to exercise any and every power of the
Managing Partner as authorized by this Agreement, as follows:

               (a) To act in the name of and on behalf of the Partnership.

               (b) In the Partnership's name and on its behalf, to make,
        execute, acknowledge and deliver all contracts, assignments, and other
        agreements, instruments or documents as are contemplated in this
        Agreement.

               (c) Generally to take and perform any and all actions necessary,
        appropriate or convenient to fulfill the obligations and duties of the
        Managing Partner as authorized by this Agreement.

        3.11 INDEMNIFICATION OF THE MANAGING PARTNER. THE PARTNERSHIP SHALL
DEFEND, INDEMNIFY, HOLD HARMLESS, RELEASE AND DISCHARGE THE MANAGING PARTNER AND
ITS AFFILIATES AND THEIR RESPECTIVE OFFICERS, DIRECTORS, AGENTS AND EMPLOYEES,
WHEN ACTING AS OR FOR THE MANAGING PARTNER, AGAINST ANY AND ALL CLAIMS, LOSSES,
LIABILITIES, DAMAGES AND CAUSES OF ACTION, WHETHER BASED ON TORT, BREACH OF
CONTRACT OR ANY OTHER LEGAL THEORY

                                       18
<PAGE>

(TO THE EXTENT THAT SUCH CLAIMS, LOSSES, LIABILITIES, DAMAGES AND CAUSES OF
ACTION ARE NOT SATISFIED BY INSURANCE CARRIED PURSUANT TO THIS AGREEMENT), ON
ACCOUNT OF TAXES, LIENS, DEBTS, PERSONAL INJURIES, DEATH OR DAMAGE TO PROPERTY
AND ALL OTHER CLAIMS OR DEMANDS OF EVERY CHARACTER ARISING OUT OF, IN CONNECTION
WITH, OR AS AN INCIDENT TO, ANY ACT OR OMISSION IN CONNECTION WITH THE MANAGING
PARTNER'S PERFORMANCE OF ITS DUTIES AND RESPONSIBILITIES UNDER THIS AGREEMENT AS
THE MANAGING PARTNER, EVEN IF CAUSED BY THE SOLE, JOINT, CONTRIBUTORY AND/OR
COMPARATIVE NEGLIGENCE, STRICT LIABILITY AND/OR OTHER FAULT (BUT NOT GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT, EXCEPT WHEN SUCH CLAIMS, LOSSES, LIABILITIES,
DAMAGES AND CAUSES OF ACTION ARISE AS A RESULT OF THE MANAGING PARTNER'S
PERFORMANCE OR OMISSION IN ACCORDANCE WITH THE INSTRUCTIONS OF THE MANAGEMENT
COMMITTEE GIVEN SPECIFICALLY WITH RESPECT TO THE PRECISE MANNER IN WHICH THE
MANAGING PARTNER IS TO PERFORM THE SPECIFIED TASK) OF THE MANAGING PARTNER, ITS
AFFILIATES, OR THEIR RESPECTIVE OFFICERS, DIRECTORS, AGENTS OR EMPLOYEES.

        3.12 THE MANAGING PARTNER'S LIABILITY. THE MANAGING PARTNER, ITS
AFFILIATES AND THEIR OFFICERS, DIRECTORS, AGENTS AND EMPLOYEES SHALL NOT BE
LIABLE TO THE PARTNERSHIP OR ANY PARTNER FOR ANY LOSS OR DAMAGE SUFFERED BY THE
PARTNERSHIP OR A PARTNER RESULTING FROM THE PERFORMANCE OF THE MANAGING
PARTNER'S DUTIES AND RESPONSIBILITIES UNDER THIS AGREEMENT, EXCEPT WHEN AND TO
THE EXTENT THAT SUCH LOSS OR DAMAGE RESULTS FROM THE GROSS NEGLI GENCE OR
WILLFUL MISCONDUCT OF THE MANAGING PARTNER OR ITS AFFILIATES OR THEIR RESPECTIVE
OFFICERS, DIRECTORS, AGENTS OR EMPLOYEES; PROVIDED THAT, WHERE SUCH LOSS OR
DAMAGE ARISES AS A RESULT OF THE MANAGING PARTNER'S PERFORMANCE OR OMISSION IN
ACCORDANCE WITH THE INSTRUCTIONS OF THE MANAGEMENT COMMITTEE GIVEN SPECIFICALLY
WITH RESPECT TO THE PRECISE MANNER IN WHICH THE MANAGING PARTNER IS TO PERFORM
THE SPECIFIED TASK, IT SHALL BE DEEMED THAT SUCH LOSS OR DAMAGE WAS NOT THE
RESULT OF GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF THE MANAGING PARTNER OR ITS
AFFILIATES OR THEIR RESPECTIVE OFFICERS, DIRECTORS, AGENTS OR EMPLOYEES.

        3.13 THE FINANCE PARTNER. Certain of the financial matters of the
Partnership and the Gathering System shall be administered by a Finance Partner,
which shall be a Partner (the "FINANCE PARTNER"). MMBGC is designated as the
initial Finance Partner.

        3.14 REMOVAL OR RESIGNATION OF THE FINANCE PARTNER. The Finance Partner
may be discharged of its powers, duties and responsibilities as the Finance
Partner and terminated as follows:

                                       19
<PAGE>

               (a) The Management Committee (without the participation of the
        member representing the Finance Partner or its Affiliates) may remove
        the Finance Partner if:

                      (1) the Finance Partner becomes insolvent or unable to pay
               its debts as they mature, makes an assignment for the benefit of
               creditors, commits an act of bankruptcy, or seeks relief under
               laws providing for the relief of debtors;

                      (2) a receiver is appointed for the Finance Partner or for
               substantially all of its property or affairs; or

                      (3) the Finance Partner commits a breach of a provision of
               this Agreement that if not cured is reasonably likely to result
               in a material economic loss to the Partnership and fails to cure
               the breach within ten (10) business days after written notice
               from the Partnership of the breach (or if such breach cannot
               reasonably be cured within such ten (10) day period, the Finance
               Partner fails to commence remedial action to cure such breach
               within such ten (10) day period or fails thereafter to continue
               diligent prosecution of such cure). If a petition for relief
               under the federal bankruptcy laws is filed by or against the
               Finance Partner, and if a federal bankruptcy court prevents the
               removal of the Finance Partner, the Management Committee (without
               the participation of the member representing the Finance Partner
               or its Affiliates) shall perform the duties of the Finance
               Partner until the Finance Partner has elected to reject or assume
               this Agreement under the Bankruptcy Code. An election by the
               Finance Partner as a debtor-in-possession or by a trustee in
               bankruptcy to reject this Agreement shall be deemed to be a
               resignation by the Finance Partner without any action by the
               Management Committee.

                      The Finance Partner shall be deemed to have waived and
               does hereby waive any right to arbitrate, litigate, or otherwise
               contest removal pursuant to this section under SECTION 15.11 or
               otherwise, but shall not be deemed to have waived the right to
               arbitrate, litigate or otherwise contest claims for wrongful or
               improper removal as a result of such removal.

               (b) The Finance Partner shall be deemed to have resigned if (1)
        the Ownership Interest of the Finance Partner and its Affiliates as
        redetermined pursuant to SECTION 1.2(A) is reduced by seventy-five
        percent (75%) or more 

                                       20
<PAGE>

        (other than a reduction resulting from the occurrence of Payout) during
        the period it is acting as Finance Partner (in a single transaction or
        in a series of transactions), (2) a reduction of the Finance Partner's
        Ownership Interest pursuant to SECTION 5.6 occurs, (3) a Change of
        Control occurs with respect to the Finance Partner, (4) any of the
        events described in SECTION 10.3(A), 10.3(B), 10.3(C) OR 10.3(D) occur
        with respect to the Finance Partner, or (5) the Finance Partner
        withdraws from the Partnership. Promptly after the occurrence of any of
        such events, the Management Committee (without the participation of the
        member representing the removed Finance Partner or its Affiliates) shall
        provide to the Finance Partner a written notice which shall state the
        name of the successor Finance Partner and the date on which the
        successor Finance Partner will assume the responsibilities of the
        Finance Partner under this Agreement. Such resignation shall become
        effective on the date that the successor Finance Partner assumes the
        duties of the Finance Partner.

               (c) The Finance Partner may resign its duties as the Finance
        Partner at any time by written notice to the Management Committee. The
        resignation shall not become effective until the successor Finance
        Partner assumes the duties and obligations of the Finance Partner, which
        the Partners shall cause to occur not later than one hundred twenty
        (120) days after the submission by the Finance Partner of its
        resignation.

               (d) In the event the Finance Partner is removed or resigns
        pursuant to this SECTION 3.14, the Finance Partner shall submit to the
        Management Committee a final accounting of its operations under this
        Agreement. The departing Finance Partner shall deliver to the successor
        Finance Partner all records, reports and data that are in its possession
        as the Finance Partner. Upon the delivery of such records, reports and
        data, the departing Finance Partner shall be released and discharged
        from, and the successor Finance Partner shall assume, all duties and
        obligations of the Finance Partner under this Agreement; provided that
        any liability of the departing Finance Partner that accrued prior to the
        effective date of the change of the Finance Partner shall,
        notwithstanding the release or discharge of the departing Finance
        Partner, continue to remain a liability of the departing Finance
        Partner. The former Finance Partner may retain copies of all such
        records, reports and data as the former Finance Partner may require,
        which copies will be prepared at the expense of the former Finance
        Partner.

               (e) If the Finance Partner is removed or resigns pursuant to this
        SECTION 3.14, the Management Committee shall select a successor Finance

                                       21
<PAGE>

        Partner by Super Majority Approval. The vote of the member of the
        Management Committee representing the Partner that was removed as the
        Finance Partner shall be excluded if such member does not vote or such
        member only votes for such removed Finance Partner to succeed itself.

        3.15 DUTIES OF THE FINANCE PARTNER. The Finance Partner shall have the
responsibility and authority, without the prior or subsequent approval of the
Management Committee, to take or cause to be taken the following actions for and
on behalf of the Partnership (and shall conduct such activities in a good and
businesslike manner and in accordance with good and prudent practice within the
industry):

               (a) Provide and maintain adequate insurance coverage for the
        account of the Partnership with a reliable insurance company(s)
        authorized to do business in the area of the Gathering System in
        accordance with the requirements of ARTICLE 13 or notify the Management
        Committee promptly of its inability to maintain such insurance coverage.
        The Finance Partner shall charge the Partnership for the actual cost of
        such insurance.

               (b) Maintain the bank accounts of the Partnership, make
        distributions to the Partners and pay invoices for expenses accrued by
        the Partnership.

               (c) Perform the functions of the Finance Partner as described in
        the Accounting Procedures.

               (d) Make distributions to the Partners.

               (e) Prepare and deliver to the Partners, on a quarterly basis, a
        report of such Partner's Payout status.

               (f) Prepare and deliver to the Partners, on a monthly basis, a
        statement of operations, partners' equity and cash flows and a balance
        sheet of the Partnership.

        3.16 INDEMNIFICATION OF THE FINANCE PARTNER. THE PARTNERSHIP AGREES TO
DEFEND, INDEMNIFY, HOLD HARMLESS, RELEASE AND DISCHARGE THE FINANCE PARTNER AND
ITS AFFILIATES AND THEIR RESPECTIVE OFFICERS, DIRECTORS, AGENTS AND EMPLOYEES,
WHEN ACTING AS OR FOR THE FINANCE PARTNER, AGAINST ANY AND ALL CLAIMS, LOSSES,
LIABILITIES, DAMAGES AND CAUSES OF ACTION, WHETHER BASED ON TORT, BREACH OF
CONTRACT OR ANY OTHER LEGAL THEORY (TO THE EXTENT THAT SUCH CLAIMS, LOSSES,
LIABILITIES, DAMAGES AND CAUSES 

                                       22
<PAGE>

OF ACTION ARE NOT SATISFIED BY INSURANCE CARRIED PURSUANT TO THIS AGREEMENT), ON
ACCOUNT OF TAXES, LIENS, DEBTS, PERSONAL INJURIES, DEATH OR DAMAGE TO PROPERTY
AND ALL OTHER CLAIMS OR DEMANDS OF EVERY CHARACTER ARISING OUT OF, IN CONNECTION
WITH, OR AS AN INCIDENT TO, ANY ACT OR OMISSION IN CONNECTION WITH THE FINANCE
PARTNER'S PERFORMANCE OF ITS DUTIES AND RESPONSIBILITIES UNDER THIS AGREEMENT AS
THE FINANCE PARTNER, EVEN IF CAUSED BY THE SOLE, JOINT, CONTRIBUTORY AND/OR
COMPARATIVE NEGLIGENCE, STRICT LIABILITY AND/OR OTHER FAULT (BUT NOT GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT, EXCEPT WHEN SUCH CLAIMS, LOSSES, LIABILITIES,
DAMAGES AND CAUSES OF ACTION ARISE AS A RESULT OF THE FINANCE PARTNER'S
PERFORMANCE OR OMISSION IN ACCORDANCE WITH THE INSTRUCTIONS OF THE MANAGEMENT
COMMITTEE GIVEN SPECIFICALLY WITH RESPECT TO THE PRECISE MANNER IN WHICH THE
FINANCE PARTNER OR SUCH AFFILIATES IS TO PERFORM THE SPECIFIED TASK) OF THE
FINANCE PARTNER, ITS AFFILIATES, OR THEIR RESPECTIVE OFFICERS, DIRECTORS, AGENTS
OR EMPLOYEES.

        3.17 THE FINANCE PARTNER'S LIABILITY. THE FINANCE PARTNER, ITS
AFFILIATES AND THEIR OFFICERS, DIRECTORS, AGENTS AND EMPLOYEES SHALL NOT BE
LIABLE TO THE PARTNERSHIP OR ANY PARTNER FOR ANY LOSS OR DAMAGE SUFFERED BY THE
PARTNERSHIP OR A PARTNER RESULTING FROM THE PERFORMANCE OF THE FINANCE PARTNER'S
DUTIES AND RESPONSIBILITIES UNDER THIS AGREEMENT, EXCEPT WHEN AND TO THE EXTENT
THAT SUCH LOSS OR DAMAGE RESULTS FROM THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT
OF THE FINANCE PARTNER OR ITS AFFILIATES OR THEIR RESPECTIVE OFFICERS,
DIRECTORS, AGENTS OR EMPLOYEES; PROVIDED THAT, WHERE SUCH LOSS OR DAMAGE ARISES
AS A RESULT OF THE FINANCE PARTNER'S PERFORMANCE OR OMISSION IN ACCORDANCE WITH
THE INSTRUCTIONS OF THE MANAGEMENT COMMITTEE GIVEN SPECIFICALLY WITH RESPECT TO
THE PRECISE MANNER IN WHICH THE FINANCE PARTNER IS TO PERFORM THE SPECIFIED
TASK, IT SHALL BE DEEMED THAT SUCH LOSS OR DAMAGE WAS NOT THE RESULT OF GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT OF THE FINANCE PARTNER OR ITS AFFILIATES OR
THEIR RESPECTIVE OFFICERS, DIRECTORS, AGENTS OR EMPLOYEES.

        3.18 EXCLUSION OR SUSPENSION OF VOTE. If a Partner is excluded or
suspended from voting under this Agreement, the percentage of Ownership
Interests required for the applicable approval shall exclude the Ownership
Interest of such Partner.

        3.19 NO VETO RIGHTS. Provided that more than two Partners are eligible
to vote upon an item, in any vote of the Management Committee under SECTIONS
3.4(A) OR 3.5(A), if the item under consideration in such vote does not achieve
the requisite level of approval under SECTIONS 3.4(A) OR 3.5(A), as applicable,
but received the approval of all but one of 

                                       23
<PAGE>

the Partners entitled to vote, then such item shall be deemed approved despite
having failed to achieve the applicable required level of approval.

                                   ARTICLE 4.
                                  AMI PROJECTS

        4.1 FACILITIES TO BE CONSTRUCTED OR ACQUIRED. Prior to the execution of
this Agreement, the DIGS was extended by construction of a twelve inch (12")
line from Viosca Knoll Block 31 to Viosca Knoll Block 121 and from Viosca Knoll
Block 80 to Viosca Knoll Block 124 (the "VK 121 AND VK 124 EXTENSION"). In
addition, the Partnership shall construct an extension of the DIGS through a
twenty-four inch (24") line approximately sixty-five (65) miles long from
Alabama State Tract 73 to Main Pass Block 261 (the "PHASE I EXTENSION").
Further, the Partnership shall install compression facilities at the platform
located in Main Pass Block 225 (the "MAIN PASS PRODUCTION - RELATED COMPRESSION
FACILITIES"). From time to time hereafter, the Partnership may agree to
construct or acquire such additional facilities as may be approved by the
Management Committee pursuant to SECTIONS 3.3, 3.4 OR 3.5.

        4.2 PROJECT PLANS. The Managing Partner shall prepare for approval by
the Management Committee a written description of the routing and location of
facilities and the specifications for the design, engineering, materials and
equipment to be used in the construction of subsequent facilities to be
constructed by the Partnership, as well as the estimated costs, estimated
construction schedule and date of completion of the facilities ("PROJECT PLAN").
The Partners approve the Project Plans for the Main Pass Production Related
Compression Facilities and for the Phase I Extension attached as EXHIBITS I AND
H hereto.

        4.3 CONSTRUCTION/ACQUISITION BUDGETS AND APPROVALS. The Partners hereby
approve the budgets for the construction of the VK 121 and 124 Extension, the
Phase I Extension and the Main Pass Production - Related Compression Facilities
as proposed in the Project Plans attached for such projects in EXHIBITS G, H AND
I.

        The Managing Partner shall be authorized to incur costs in connection
with the VK 121 and 124 Extension, the Phase I Extension and the Main Pass
Production - Related Compression Facilities to the extent provided in the
approved construction budgets for such projects. The provisions of SECTIONS
4.3(D), 4.4, 4.5, 4.6 AND 4.7 shall apply to the construction of the VK 121 and
124 Extension, the Phase I Extension and the Main Pass Production - Related
Compression Facilities. With respect to the construction of any additional
facilities the following procedures shall apply:

                                       24
<PAGE>

               (a) If any additional Project Plans or acquisitions are approved
        by the Management Committee, the Managing Partner shall submit to the
        Management Committee for its approval a budget ("CONSTRUCTION BUDGET"
        or, in the case of an acquisition, "ACQUISITION BUDGET") stating the
        estimated costs that the Managing Partner expects to incur in connection
        with the construction or acquisition. A Construction Budget shall be
        submitted at least sixty (60) days prior to commencement of
        construction. An Acquisition Budget shall be submitted at least sixty
        (60) days prior to the date an offer for such acquisition is to be made
        (or such shorter period of time available to the Partnership, if an
        offer is required in less than sixty (60) days).

               (b) A Construction Budget shall set forth the estimated costs and
        expenditures by quarterly periods, shall itemize the costs estimated in
        the budgets by such individual line items, and shall include such
        supporting documentation and data as reasonably requested by the
        Management Committee. An Acquisition Budget shall set forth the
        acquisition costs and related transaction costs, and shall include such
        supporting documentation and data as reasonably required by the
        Management Committee.

               (c) Unless otherwise authorized by the Management Committee,
        construction costs or acquisition costs shall not be incurred for the
        construction or acquisition of any additional facilities until a
        Construction Budget or Acquisition Budget, as applicable, has been
        approved by the Management Committee.

               (d) During the progress of any construction, the Managing Partner
        shall provide monthly reports to the Management Committee as to such
        progress, and, during the progress of any construction or acquisition,
        the Managing Partner shall notify the Management Committee promptly of
        unsatisfactory progress or of any occurrence that may cause a
        substantially higher cost than was estimated and approved in the
        applicable budget. If it appears that (1) the cost of any budgeted item
        will exceed the budgeted amount of such item by the greater of 15
        percent of the budgeted amount for that item or $50,000, or (2) an item
        not contemplated by the applicable budget has an estimated cost in
        excess of $50,000, or (3) any aggregate of items not contemplated by the
        applicable budget have estimated costs in excess of $100,000, then any
        such excess budgeted cost or unbudgeted cost shall not be incurred
        without the prior approval of the Management Committee. This approval
        may be oral in order to expedite action, but shall be followed
        immediately by written approval.

                                       25
<PAGE>

        4.4 COSTS AND PAYMENT. The Managing Partner shall keep a full and
accurate account of all costs and expenses incurred in connection with the
planning, design, construction, testing and placing in service of Partnership
facilities in accordance with the Accounting Procedures. The Partnership shall
provide funds for all such costs and expenses of any additional facilities in
accordance with ARTICLE 5 of this Agreement.

        4.5 CONSTRUCTION. The Managing Partner shall direct all activities
necessary to design, construct, test and place in service any additional
facilities authorized by the Management Committee, all of which shall meet the
minimum federal safety standards established by the U.S. Department of
Transportation for pipeline facilities. All equipment and materials and
third-party contractors, as required, shall be obtained based on competitive
bids. Unless otherwise specifically authorized in writing by the Management
Committee, the Managing Partner shall require (a) a performance bond payable to
the Partnership from the contractor who actually constructs Partnership
facilities, and (b) a payment bond, each in an amount equal to the contractor's
bid for performance of the construction.

        4.6 PERMITS. The Managing Partner shall acquire, or cause to be
acquired, in the name of the Partnership, or for or on its behalf, all permits,
certificates, rights-of-way and state, county and/or federal approvals and
authorizations as may be necessary for the Partnership to construct, own and
operate any approved facilities constructed by the Partnership. Any permits,
certificates, rights of-way, approvals and authorizations acquired by the
Managing Partner in its own name pursuant to this section shall be immediately
assigned to the Partnership.

        4.7 INSPECTION AND TESTING. During construction of any Partnership
facilities each Partner shall have the right of access to the construction
site(s) and the right to inspect all phases of the construction work and all
records pertaining thereto at all such times and locations as do not interfere
with such construction. The Managing Partner shall advise each Partner in
writing when installation of all or any portion of the Partnership facilities
has been completed and the date, time and place of any testing of such
Partnership facilities or any portion thereof. Each Partner shall have the
option to be present and witness any and all such testing. Upon completion of
the installation and testing of the Partnership facilities, the Managing Partner
shall provide the Partners with "as built" drawings and data relating to
engineering calculations, specifications, materials and equipment installation
and testing of the Partnership facilities, and an itemized inventory and
documentation of the Partnership facilities.

                                       26
<PAGE>

        4.8    CONSTRUCTION AND ACQUISITION OF FACILITIES IN THE AMI.

               (a)    The following terms are defined as follows:

                      "AMI" shall mean the area contained within the outline on
               the map attached hereto as EXHIBIT B-1.

                      "E&P AFFILIATE" means an Affiliate of any Partner engaged
               principally in the business of exploring for and producing oil,
               gas, and other hydrocarbons and any wholly-owned subsidiary of
               any such Affiliate engaged in the same business.

                      "PERMITTED GATHERING SYSTEMS" means any gathering or
               transportation system that, at the time it is acquired or placed
               in service, gathers or transports, over any distance and through
               any diameter of pipe, gas and/or other hydrocarbons owned by an
               E&P Affiliate and other producers, if any, jointly developing the
               field where such gas and/or other hydrocarbons are produced (the
               "PRODUCTION POINT") from (x) the Production Point to a downstream
               central collection point (offshore or onshore) at which
               separation, measurement, dehydration, treating, or compression
               operations occur (the "CDP") or from (y) the Production Point or
               the CDP for a Production Point to any surface or subsea
               interconnection points (offshore or onshore) with any gathering
               system, transportation system or other carrier.

               (b) Except as otherwise provided in SECTION 4.9, none of the
        Partners shall (and each Partner shall cause each of its Affiliates and
        their respective officers not to) participate, whether directly or
        indirectly (other than through the Partnership or as a minority
        shareholder in a publicly traded entity), in the ownership or operation
        of (1) any gathering or transportation system that would gather or
        transport primarily gas produced from any blocks within the AMI or (2)
        any gathering or transportation system originating outside the AMI that
        will interconnect with the Gathering System, unless the Management
        Committee approves of a Partner or an Affiliate thereof undertaking the
        project outside of the Partnership. The prohibition in the foregoing
        sentence shall not apply to (a) pipelines regulated pursuant to the
        Natural Gas Act of 1938, as amended, or (b) Permitted Gathering Systems.
        As to Coastal, the prohibitions set forth in this Section shall not
        apply within Main Pass Blocks 186, 187, 188, 197, 198, 199, 200, 211,
        212, and 213.

                                       27
<PAGE>

        4.9    SOLE-RISK AMI PROJECTS.

               (a)    DEFINITIONS:

                      (1) "AMI PROJECT" means the ownership or operation of any
               system that would gather or transport primarily gas produced from
               any blocks within the AMI, other than projects or facilities to
               which the prohibitions in SECTION 4.8 do not apply.

                      (2) "EXTENSION PROJECT" means an AMI Project that would
               connect to the Gathering System (other than loops, compressor
               facilities, or other construction designed to increase the
               capacity of the Gathering System as it then exists, which
               projects shall not proceed on a sole-risk basis).

                      (3) "NEW SYSTEM PROJECT" means an AMI Project other than
               an Extension Project, loop, compressor facility, or any other
               construction designed to increase the capacity of the Gathering
               System as it then exists.

                      (4) "NON-CONTRIBUTING PARTNER" means with respect to a
               Sole-Risk AMI Project, any Partner that is not a Sole-Risk
               Partner.

                      (5) "SOLE-RISK AMI PROJECT" means an AMI Project conducted
               on a sole-risk basis by Sole-Risk Partners in accordance with the
               terms and conditions of this SECTION 4.9.

                      (6) "SOLE-RISK NEW SYSTEM PROJECT" means a Sole-Risk AMI
               Project which is a New System Project.

                      (7) "SOLE-RISK EXTENSION PROJECT" means a Sole-Risk AMI
               Project which is an Extension Project.

                      (8) "SOLE-RISK PARTNER" means with respect to a Sole-Risk
               AMI Project, a Partner participating in such project at such
               Partner's sole cost, risk and expense.

               (b) MORATORIUM ON SOLE-RISK AMI PROJECTS. Each of the Partners
        agrees that, for a period of one year following the Effective Date, no
        AMI Project shall be undertaken as a Sole-Risk AMI Project.

                                       28
<PAGE>

               (c) PROPOSAL OF SOLE-RISK AMI PROJECT. Subject to SECTION 4.9(B),
        in the event that the Management Committee fails to approve an AMI
        Project on behalf of the Partnership, any Partner which voted in favor
        of undertaking such AMI Project (a "PROPOSING PARTNER") may propose to
        undertake such project as a Sole-Risk AMI Project in accordance with the
        provisions of this SECTION 4.9 by providing written notice to the
        Management Committee within thirty (30) days after the date that the
        Management Committee declines to approve such proposal (or, if a quorum
        of the Management Committee is not attained on the date that the
        Management Committee is scheduled to meet to consider such proposal,
        within thirty (30) days after the date that such meeting was scheduled).
        Written notice to be provided pursuant to SECTION 4.9(C) shall include
        copies of all correspondence, maps, studies, documents, and other
        relevant information in the Proposing Partner's possession relating to
        such Sole-Risk AMI Project. The notice shall include an estimate by the
        Proposing Partner of the total costs to participate in the Sole- Risk
        AMI Project.

               Each Partner other than a Partner who voted not to approve such
        AMI Project shall then have thirty (30) days after receipt of such
        notice to elect by notice to the Proposing Partner whether such Partner
        desires to participate along with the Proposing Partner in the Sole-Risk
        AMI Project. If the Proposing Partner does not receive actual written
        notice of any Partner's election to participate in the Sole-Risk AMI
        Project within such thirty (30) day period, such failure shall
        constitute an election by such Partner (whose notice was not timely
        received) not to participate in the Sole-Risk AMI Project. If the
        Proposing Partner receives written notice from any Partner of its
        election to participate in the Sole-Risk AMI Project within the thirty
        (30) day period, that Partner shall then be entitled to participate in
        the Sole-Risk AMI Project in the proportion that its Ownership Interest
        bears to the aggregate Ownership Interests of the Proposing Partner and
        all other Partners who elected to participate in the Sole-Risk AMI
        Project. No Sole-Risk AMI Project shall be conducted that would
        potentially result in the then-existing facilities of the Partnership
        becoming subject to the jurisdiction of the Federal Energy Regulatory
        Commission or any successor regulatory agency under the Natural Gas Act
        of 1938, as amended.

               (d) SOLE-RISK NEW SYSTEM PROJECTS. If the Sole Risk Partners for
        any New System Project have complied with the other terms of this
        SECTION 4.9, such Sole-Risk Partners or their Affiliates shall have the
        right to undertake a Sole-Risk New System Project, subject to the
        Partnership option described in this SECTION 4.9(D).

                                       29
<PAGE>

               At such time as the Sole-Risk Partners' allocable share of
        distributable cash or, if not a partnership, its equivalent,
        attributable to the Sole-Risk New System Project equals two hundred
        percent (200%) of the aggregate costs and expenses of the Sole-Risk New
        System Project incurred by the Sole-Risk Partners ("SOLE-RISK NEW SYSTEM
        PROJECT PAYOUT"), the Sole-Risk Partners shall promptly notify the
        Managing Partner, and the Managing Partner shall notify all of the
        Non-Contributing Partners that Sole-Risk New System Project Payout has
        occurred. The Partnership, with the approval of 75% of the Ownership
        Interests of the Non-Contributing Partners, shall have an option to
        acquire the interests of the Sole Risk Partners in the Sole-Risk New
        System Project at a price of one dollar ($1.00), effective as of the
        date of Sole-Risk New System Project Payout. The option described above
        shall expire sixty (60) days following notification to the Managing
        Partner by the Sole-Risk Partners that Sole-Risk New System Project
        Payout has occurred. During such sixty (60) day option period, the
        Sole-Risk Partners shall grant the right of inspection of the books and
        facilities of the Sole-Risk New System Project to the NonContributing
        Partners, or shall cooperate fully in requesting such rights on behalf
        of the Non-Contributing Partners to the extent that the Sole-Risk
        Partners do not have the authority to grant such rights.

               The Sole-Risk Partners' books and records with respect to the
        Sole- Risk New System Project shall be maintained in accordance with
        industry standards, and such books and records shall be subject to
        review and audit by the Partnership and any Non-Contributing Partner.

               (e) SOLE-RISK EXTENSION PROJECTS. If the Sole-Risk Partners for
        any Extension Project have complied with the other terms of this SECTION
        4.9, such Sole-Risk Partners shall have the right to undertake a
        Sole-Risk Extension Project which shall be operated by the Managing
        Partner, subject to the following terms and conditions:

                      (1) The Managing Partner shall convene a meeting of the
               Management Committee within fifteen (15) days after the proposal
               to undertake a Sole-Risk Extension Project to determine (i) an
               equitable method to allocate revenues, costs and expenses of the
               Partnership that are attributable to the Sole-Risk Extension
               Project, (ii) terms of gathering services offered through the
               sole-risk facilities (other than rates that are incremental and
               in addition to the rates charged for gathering on the then
               existing Gathering System), and access to the then existing
               Gathering System, which shall be substantially the same 

                                       30
<PAGE>

               as terms offered to other producers who are shippers, and (iii)
               an appropriate reserve for the abandonment of the sole-risk
               facilities at the end of its useful life and the amount and
               timing of deposits into the reserve (the "SOLE-RISK ISSUES"). If
               the Management Committee is unable to agree on any of the
               Sole-Risk Issues within thirty (30) days after the date that the
               proposal to undertake the Sole-Risk Extension Project is received
               by the Management Committee (the expiration of such thirty (30)
               day period ending upon the date by which Partners must elect to
               become Sole-Risk Partners as to such project) either any
               Sole-Risk Partner or any Non-Contributing Partner may elect to
               refer the unresolved issues to mediation pursuant to SECTION
               4.9(E)(2). If not resolved by the Management Committee and no
               Partner elects to initiate mediation, the Sole-Risk Extension
               Project shall not be undertaken. The Sole-Risk Partners may
               determine without the input of the Management Committee the rates
               for gathering services offered through the sole-risk facilities
               that are incremental and in addition to the rates charged for
               gathering on the then existing Gathering System; provided that
               such rates are commercially reasonable and do not discriminate in
               favor of any Partner's Affiliate.

                      (2) Within five (5) days after any Partner elects to refer
               unresolved Sole-Risk Issues to mediation, the Sole-Risk Partners
               shall deliver to the Non-Contributing Partners a list of five
               individuals of appropriate background and experience acceptable
               to the Sole-Risk Partners to serve as the mediator. In the event
               that the NonContributing Partners do not approve of any of the
               individuals selected by the Sole-Risk Partners within ten (10)
               days after the date that the Sole-Risk Partners deliver to the
               Non-Contributing Partners its list of proposed individuals, then
               either the Non-Contributing Partners or the Sole-Risk Partners
               may request the Chief Judge of the United States District Court
               in the Southern District of Texas to appoint a mediator of
               appropriate background and experience. The Chairman of the
               Management Committee shall engage the mediator selected by the
               Partners or appointed by the Chief Judge within ten (10) days
               after the mediator is selected or appointed and shall notify the
               Partners of the date of engagement. Both the Non-Contributing
               Partners and the Sole-Risk Partners shall submit to the mediator
               within thirty (30) days after the date that the mediator has been
               engaged such information as it desires and shall cooperate with
               the mediator in promptly providing such additional information as
               the mediator deems 

                                       31
<PAGE>

               appropriate. The mediator shall be requested to deliver his
               decision on the Sole-Risk Issues submitted to him by the Partners
               within sixty (60) days after the date that the mediator has been
               engaged. The decision of the mediator shall be final and binding
               on the Partners and the Partnership. The mediator may engage
               accountants, engineers and other consultants as the mediator
               deems appropriate. The fees and expenses of the mediator,
               including the cost of the consultants engaged by the mediator,
               shall be (i) shared by the Sole-Risk Partners and the
               Non-Contributing Partners according to their Ownership Interests
               if the Sole-Risk Partners confirm their election to proceed with
               the Sole-Risk AMI Project pursuant to SECTION 4.9(E)(3) below or
               (ii) borne by the Sole-Risk Partners if they do not confirm their
               election to proceed with the Sole-Risk AMI Project pursuant to
               SECTION 4.9(E)(3) below.

                      (3) Within ten (10) days after the determination by the
               Management Committee or the mediator of the Sole-Risk Issues,
               each Sole-Risk Partner shall be entitled to confirm its election
               to undertake the Sole-Risk Extension Project under the allocation
               method selected by either the Management Committee or the
               mediator. If none of the Sole-Risk Partners timely confirms its
               election, the Sole-Risk Extension Project shall not be
               undertaken. If any Sole-Risk Partner timely confirms its
               election, the Sole-Risk Extension Project shall be undertaken as
               hereinafter provided and any Sole-Risk Partner who did not timely
               confirm its election shall become a Non-Contributing Partner.

                      (4) Any sole-risk facilities which are attributable to a
               Sole- Risk Extension Project shall be part of the Gathering
               System and shall be managed by the Managing Partner and the
               Finance Partner.

                      (5) If a Sole-Risk Extension Project is undertaken, then
               all Management Committee decisions with respect to such Sole-Risk
               Extension Project (other than pursuant to SECTIONS 4.9(E)(1),
               4.9(E)(3) AND 4.9(E)(4)) shall be made without regard to the
               votes of the representatives of the Non-Contributing Partners and
               the Managing Partner shall perform its obligations with respect
               to the Sole-Risk Extension Project and related facilities as if
               it were undertaken with the approval of the Management Committee.

                                       32
<PAGE>

                      (6) Each Sole-Risk Partner on a proportionate basis (based
               on the proportion that the Ownership Interest of each Sole-Risk
               Partner bears to the aggregate Ownership Interests of all
               Sole-Risk Partners) shall (A) pay all of the additional capital
               contributions requested by the Managing Partner for the Sole-Risk
               Extension Project (to cover construction costs and all other
               costs and expenses in excess of the revenue attributable to the
               sole-risk facilities); (B) receive distributions of all
               distributable cash attributable to the sole-risk facilities
               except for the amounts set forth in SECTION 4.9(F); (C) be
               allocated all items of income, gain, loss, deduction and credit
               attributable to the Sole-Risk Extension Project and any
               extensions therefrom, except for the amounts set forth in SECTION
               4.9(F); and (D) be allocated all construction, operating,
               maintenance, and general and administrative costs and expenses
               attributable to the Sole-Risk Extension Project (including the
               funding of any abandonment reserve account), until the Sole-Risk
               Partners' allocable share of distributable cash from the
               Partnership attributable to the Sole-Risk Extension Project equal
               to two hundred percent (200%) of the aggregate capital
               contributions to the Partnership made by the Sole-Risk Partners
               with respect to the Sole- Risk Extension Project ("SOLE-RISK
               EXTENSION PROJECT PAYOUT").

                      The occurrence of Sole-Risk Extension Project Payout shall
               not entitle any Non-Contributing Partner to any of the
               then-existing Capital Account balances of a Sole-Risk Partner
               relating to the Sole-Risk Extension Project.

                      (7) Upon the occurrence of Sole-Risk Extension Project
               Payout, the special allocations attributable to such Sole-Risk
               Extension Project shall automatically expire without further
               action by the Management Committee.

               (f) For all gas originating in the OCS Destin Dome Area and
        flowing through DIGS as configured on the date hereof, the Partnership
        shall be entitled to the first five cents (5(cent)) per MMBtu of any
        fees or other payments for gathering services or other services relating
        to use of Sole-Risk Extension Project, and each agreement relating to
        use of the Sole-Risk Extension Project shall provide for a fee of at
        least five cents (5(cent)) per MMBtu.

               (g) With respect to a Sole-Risk Extension Project, all contracts
        for the purchase of goods, materials, supplies and services utilized in
        connection 

                                       33
<PAGE>

        with the construction of any facilities related to such Sole-Risk
        Extension Project must contain a provision that the third-party will
        have no recourse against the Partnership, the Non-Contributing Partners
        and the Managing Partner (unless the Managing Partner is a Sole-Risk
        Partner) and that the Partnership, the Non-Contributing Partners and the
        Managing Partner (unless the Managing Partner is a Sole-Risk Partner)
        shall have no obligations under the contracts. The Sole-Risk Partners
        shall indemnify, defend and hold harmless the Partnership, the
        Non-Contributing Partners and the Managing Partner (unless the Managing
        Partner is a Sole-Risk Partner or is otherwise liable under SECTION
        3.12) from all claims, demands, losses and causes of action attributable
        to the Sole-Risk Extension Project.

               (h) All Sole-Risk Extension Projects shall be conducted in
        accordance with the quality requirements and specifications of this
        ARTICLE 4 and the applicable gas quality requirements and engineering
        specifications of the Gathering System.

               (i) The Finance Partner shall provide to the Partners by the
        close of each calendar quarter a statement showing the status of each
        Sole-Risk Extension Project Payout as of the end of the previous month.

               (j) Any extension of a Sole-Risk AMI Project shall be considered
        to be a part of such project for purposes of voting thereon and
        allocations of costs and revenues attributable thereto.

        4.10 NON-CONSENT. If the Partnership has approved an AMI Project for
which the initial budget exceeds $5 million, any Partner which voted against the
approval of such project shall be entitled, within fifteen (15) days after such
approval, to give the Partnership written notice that such Partner elects to
become, with respect to such project, a nonconsenting partner ("NON-CONSENTING
PARTNER"). With respect to a project as to which there exists one or more
Non-Consenting Partners (a "NON-CONSENT PROJECT"), the following shall apply:

               (a) The Managing Partner shall convene a meeting of the
        Management Committee within fifteen (15) days after receipt of notice
        that a Partner elects to become a Non-Consenting Partner to determine an
        equitable method to allocate revenues, costs and expenses of the
        Partnership that are attributable to the Non-Consent Project (the
        "NON-CONSENT ISSUES"). If the Partners are unable to agree on any of the
        Non-Consent Issues within thirty (30) days after the date that the
        election to become a Non-Consenting Partner is received by the
        Management Committee, either any Non-Consent 

                                       34
<PAGE>

        Partner or any Consenting Partner may elect to refer the unresolved
        issues to mediation pursuant to SECTION 4.10(B). If not resolved by the
        Management Committee and no Partner elects to initiate mediation, the
        Non-Consenting Partners shall be deemed to have become Consenting
        Partners. The Consenting Partners may determine without the input of the
        Non-Consenting Partners the rates for gathering services offered through
        the Non-Consent Facilities that are incremental and in addition to the
        rates charged for gathering on the then existing Gathering System.

               (b) Within five (5) days after any Partner elects to refer
        unresolved Non-Consent Issues to mediation, the Non-Consenting Partners
        shall deliver to the Consenting Partners a list of five individuals of
        appropriate background and experience acceptable to the Non-Consenting
        Partners to serve as the mediator. In the event that the Consenting
        Partners do not approve of any of the individuals selected by the
        Non-Consenting Partners within ten (10) days after the date that the
        Non-Consenting Partners deliver to the Consenting Partners its list of
        proposed individuals, then either the Consenting Partners or the
        Non-Consenting Partners may request the Chief Judge of the United States
        District Court in the Southern District of Texas to appoint a mediator
        of appropriate background and experience. The Chairman of the Management
        Committee shall engage the mediator selected by the Partners or
        appointed by the Chief Judge within ten (10) days after the mediator is
        selected or appointed and shall notify the Partners of the date of
        engagement. Both the Consenting Partners and the Non-Consenting Partners
        shall submit to the mediator within thirty (30) days after the date that
        the mediator has been engaged such information as it desires and shall
        cooperate with the mediator in promptly providing such additional
        information as the mediator deems appropriate. The mediator shall be
        requested to deliver his decision on the Non-Consent Issues submitted to
        him by the Partners within sixty (60) days after the date that the
        mediator has been engaged. The decision of the mediator shall be final
        and binding on the Partners and the Partnership. The mediator may engage
        accountants, engineers and other consultants as the mediator deems
        appropriate. The fees and expenses of the mediator, including the cost
        of the consultants engaged by the mediator, shall be (i) shared by the
        Non-Consenting Partners and the Consenting Partners according to their
        Ownership Interests if the Non-Consenting Partners confirm their
        election to proceed as Non-Consenting Partners or (ii) borne by the
        NonConsenting Partners if they do not confirm their election to proceed
        as NonConsenting Partners as described below.

                                       35
<PAGE>

               (c) Within ten (10) days after the determination by the
        Management Committee or the mediator of the Non-Consent Issues, each
        Non-Consenting Partner shall be entitled to confirm its election to
        proceed as a NonConsenting Partner under the allocation method selected
        by either the Management Committee or the mediator. If none of the
        Non-Consenting Partners timely confirms its election, the Non-Consent
        Project shall no longer be governed under the terms of this section, but
        shall proceed under the terms of this Agreement as if no Partner had
        elected to become a NonConsenting Partner. If any Non-Consenting Partner
        timely confirms its election, the Non-Consent Project shall be
        undertaken as hereinafter provided and any Non-Consenting Partner who
        did not timely confirm its election shall become a Consenting Partner.

               (d) Any facilities which are attributable to a Non-Consent
        Project shall be part of the Gathering System and shall be managed by
        the Managing Partner and the Finance Partner.

               (e) If a Non-Consent Project is undertaken, then all Management
        Committee decisions with respect to such Non-Consent Project (other than
        pursuant to SECTIONS 4.10(A), AND 4.10(C) shall be made without regard
        to the votes of the representatives of the Non-Consenting Partners.

               (f) Each Partner, which is not a Non-Consenting Partner (a
        "CONSENTING PARTNER") on a proportionate basis (based on the proportion
        that the Ownership Interest of each Consenting Partner bears to the
        aggregate Ownership Interests of all Consenting Partners) shall (1) pay
        all of the additional capital contributions requested by the Managing
        Partner for the Non-Consent Project (to cover construction costs and all
        other costs and expenses in excess of the revenue attributable to any
        facilities that are the subject of the Non-Consent Project (as to any
        Non-Consent Project, a "NON- CONSENT FACILITY"); (2) receive
        distributions of all distributable proceeds attributable to the
        Non-Consent Project; (3) be allocated all items of income, gain, loss,
        deduction and credit attributable to the Non-Consent Project and any
        extensions therefrom; and (4) be allocated all construction, operating,
        maintenance, and general and administrative costs and expenses
        attributable to the Non-Consent Project (including the funding of any
        abandonment reserve account), until the Consenting Partners have
        received cash distributions from the Partnership attributable to the
        Non-Consent Project equal to two hundred percent (200%) of the aggregate
        capital contributions to the Partnership made by the Consenting Partners
        with respect to the Non- Consent Project ("NON-CONSENT PROJECT PAYOUT").

                                       36
<PAGE>

               (g) Upon the occurrence of Non-Consent Project Payout, the
        special allocations set forth above shall automatically expire without
        further action by the Management Committee. The occurrence of
        Non-Consent Project Payout shall not entitle any Non-Consenting Partner
        to any of the then-existing Capital Account balances of a Consenting
        Partner with respect to which Non- Consent Project Payout has occurred.

               (h) The Consenting Partners of any Non-Consent Project shall
        indemnify, defend and hold harmless the Non-Consenting Partners from all
        claims, demands, losses and causes of action attributable to the
        Non-Consent Project until such Non-Consent Project Payout has occurred
        as to such project.

                                   ARTICLE 5.
                         CAPITAL CONTRIBUTIONS/FINANCING

        5.1 CAPITAL CONTRIBUTIONS BY DIGC. DIGC has contributed as of February
28, 1996, $244,197, which was used, in part, as follows:

               (a) $11,000 to pay DIGC's one percent (1%) share of the amount
        payable to Tenneco Gas Gathering Company in connection with the
        Agreement to Assign Permit dated February 10, 1996, among Tenneco Gas
        Gathering Company, Pipeline & Processing Group, Inc. and the
        Partnership,

               (b) $41,678 to pay outstanding accounts payable,

               (c) $185,019 to pay one percent (1%) of the amount payable to
        Swiss Bank under the Credit Agreement dated June 15, 1993, as amended,
        and

               (d) $6,500 to pay DIGC's one percent (1%) share of the amount
        payable to Preston A. Price, acting for himself and as attorney in fact
        in connection with the Assignment of Interests dated February 28, 1996,
        among Preston A. Price, et al. and the Partnership.

               DIGC has not made any additional capital contributions since
        February 28, 1996.

                                       37
<PAGE>

        5.2 CAPITAL CONTRIBUTIONS BY MMBGC. MMBGC has contributed as of February
28, 1996, $78,497,316, which was used, in part, as follows:

               (a) $1,089,000 to pay MMBGC's ninety-nine percent (99%) share of
        the amount payable to Tenneco Gas Gathering Company in connection with
        the Agreement to Assign Permit dated February 28, 1996, among Tenneco
        Gas Gathering Company, Pipeline & Processing Group, Inc. and the
        Partnership,

               (b) $4,126,085 to pay outstanding accounts payable,

               (c) $18,316,881 to pay ninety-nine percent (99%) of the amount
        payable to Swiss Bank under the Credit Agreement dated June 15, 1993, as
        amended, and

               (d) $643,500 to pay MMBGC's ninety-nine percent (99%) share of
        the amount payable to Preston A. Price, acting for himself and as
        attorney in fact in connection with the Assignment of Interests dated
        February 28, 1996, among Preston A. Price, et al. and the Partnership.

               MMBGC has not made any additional capital contributions since
        February 28, 1996. On June 30, 1996, PDI acquired a thirty-five percent
        (35%) Ownership Interest and on July 1, 1996, PDI acquired five percent
        (5%) Ownership Interest from MMBGC.

        5.3 CENTANA, CNG AND COASTAL CONTRIBUTIONS. As of the Effective Date,
Centana, CNG and Coastal shall each be deemed to have contributed to the
Partnership $18,333,333, being 1/3 of the agreed contributed value of the Main
Pass Assets.

        5.4 CAPITAL CONTRIBUTIONS FOR VK 121 AND VK 124 EXTENSION AND PHASE I
EXTENSION. Each Partner shall make a capital contribution to the Partnership for
the VK 121 and VK 124 Extensions, the Phase I Extension and the Main Pass
Production - Related Compression Facilities in the amounts and, at the time
required, by the Contribution Agreement, or SECTION 4.3.

        5.5 OTHER CONTRIBUTIONS. In order to meet the cash requirements of the
Partnership in excess of the contributions made pursuant to SECTIONS 5.1, 5.2
AND 5.3, the Managing Partner with approval of the Management Committee may make
cash calls monthly or at less frequent intervals on the Partners for required
capital contributions by each of the Partners proportionate to its Ownership
Interest. Each cash call made pursuant to this SECTION 5.5 shall be in writing
and shall contain the following information:

                                       38
<PAGE>

               (a) The total amount of contributions requested from all
        Partners.

               (b) The amount of contribution required from each Partner,
        including the amount required from the Partner to whom the request is
        addressed.

               (c) The purpose for which the funds are to be applied in
        reasonable detail.

               (d) The date on which payments of the contributions shall be made
        by each Partner, which shall be not less than ten (10) days and not more
        than thirty (30) days after the date on which the cash call is received
        by each Partner.

        5.6    FAILURE TO MAKE CONTRIBUTIONS.

               (a) If a Partner shall default in any of its obligations under
        SECTIONS 5.4 OR 5.5 to make contributions to the Partnership in
        accordance with the terms of any call for such contributions, the
        Managing Partner shall immediately notify each of the Partners (a
        "DEFAULT NOTICE"). If the contribution has not been made by the
        defaulting Partner within two (2) business days after the receipt of the
        Default Notice, the Managing Partner shall again notify each of the
        Partners. Within five (5) business days after the receipt of the Default
        Notice, if the default has not been cured by the payment of the
        contribution and interest thereon (calculated as hereinafter provided)
        (the "DEFAULT AMOUNT"), each of the non-defaulting Partners may, in its
        sole discretion, pay to the Managing Partner its portion (based on the
        ratio that each non-defaulting Partner's Ownership Interest bears to the
        aggregate Ownership Interests of all non-defaulting Partners
        participating in such contribution (the non-defaulting Partners that so
        elect are herein referred to as the "PARTICIPATING PARTNERS")) of the
        Default Amount.

               (b) During the continuance of any payment default by any Partner,
        the Partner shall not be entitled to receive any cash distributions and
        the Participating Partners will share in all cash distributions that
        otherwise would have been made to the defaulting Partner on a
        proportionate basis based on the ratio that each Participating Partner's
        Ownership Interest bears to the aggregate Ownership Interests of all
        Participating Partners. The defaulting Partner shall not be permitted to
        be represented on the Management Committee or other committees, and will
        have its voting rights suspended, but the defaulting Partner shall
        continue to be liable for its obligations as a 

                                       39
<PAGE>

        Partner under this Agreement. If a defaulting Partner cures its default
        within the thirty (30) day period described in SECTION 5.6(D), by paying
        to the Partnership the amount of the default and the interest thereon
        calculated under SECTION 5.6(C) less the amount that was distributed to
        the Participating Partners from the amounts that were otherwise
        distributable to the defaulting Partner, the amount paid shall be
        distributed to the Participating Partners pro rata in accordance with
        their Ownership Interests.

               (c) Interest shall accrue on unpaid contributions from the date
        that the contribution became payable until the contribution is paid at a
        rate equal to the lesser of fifteen percent (15%) per annum or the
        maximum lawful rate.

               (d) In the event that a defaulting Partner fails to pay to the
        Partnership any portion of the Default Amount as provided herein on or
        prior to the thirtieth (30th) day after the due date for the
        contribution or the Participating Partners have not received from the
        amounts that were otherwise distributable to the defaulting Partner the
        Default Amount plus interest thereon as provided herein prior to the
        thirtieth (30th) day after the due date for the contribution, the
        Participating Partners may elect to (x) continue receiving the benefits
        of SECTIONS 5.6(B) AND 5.6(C) OR (Y) require the Partnership to reduce
        the Ownership Interest of the defaulting Partner, effective on the
        thirty-first (31st) day after the due date for the contribution (the
        "ADJUSTMENT DATE"), to a percentage determined by multiplying the
        Ownership Interest of the defaulting Partner (as determined on the
        Adjustment Date) by a number equal to one minus a fraction, the
        numerator of which is one hundred fifty percent (150%) of the Default
        Amount less the amounts that have been distributed to the Participating
        Partners prior to the adjustment Date that were otherwise distributable
        to the defaulting Partner, and the denominator of which is the product
        of (1) the Ownership Interest of the defaulting Partner (as determined
        on the Adjustment Date) multiplied by (2) the aggregate amount of the
        Capital Accounts of all Partners on the Adjustment Date. The adjustment
        shall apply separately for each default on a cash call. The Ownership
        Interests of the Participating Partners shall be adjusted upward by the
        proportion of the amount of the downward adjustment made to the
        Ownership Interest of the defaulting Partner.

               (e) If the Participating Partners have elected the remedies
        provided in SECTION 5.6(D)(Y), the default to which such election is
        related will be deemed to have been cured and the defaulting Partner
        will no longer be deemed a non-defaulting Partner for this SECTION 5.6,
        except for purposes of SECTION 5.6(F).

                                       40
<PAGE>

               (f) If at any time or over a course of time, the Ownership
        Interest of a Partner is reduced by seventy-five percent (75%) or more
        as a result of the provisions of this SECTION 5.6, the defaulting
        Partner shall not be permitted to be represented on the Management
        Committee or other committees and will have its voting rights suspended,
        but the defaulting Partner shall continue to be liable for its
        obligations as a Partner under this Agreement.

               (g) Notwithstanding the foregoing, the remedies provided in
        SECTION 5.6 are cumulative and are not exclusive, and in the event of a
        default by a Partner, the Partnership and the Partners shall be entitled
        to all available legal or equitable remedies.

        5.7 SELF-INSURANCE CONTRIBUTIONS. Any self-insured Partner shall
contribute to the Partnership an amount equal to its Ownership Interest share of
the insurance proceeds that the Partnership would have received had such Partner
(and any other Partners that self insure) not elected to be self-insured under
SECTION 13.5 within three business days of receipt by such Partner of written
notice from the Managing Partner that insurance proceeds have been received by
the Partnership with respect to insurance carried by the partnership for
Partners who did not make such election, or, in the absence of such insurance,
as determined by the Management Committee.

                                   ARTICLE 6.
                       OPERATING COSTS AND COMPENSATION OF
                     THE MANAGING PARTNER AND OTHER PARTNERS

        6.1    BUDGETS, APPROVALS AND AUTHORIZATIONS.

               (a) On or before September 1 of each year the Managing Partner
        shall prepare and submit for approval of the Management Committee an
        operating budget ("OPERATING BUDGET") estimating the revenues, costs and
        expenses which will be received or incurred in connection with the
        operation and maintenance of the Gathering System during the next
        succeeding fiscal year. The Operating Budgets shall set forth the
        estimated costs and expenditures by quarterly periods and shall itemize
        the costs estimated in the budgets by such individual line items as
        reasonably requested by the Management Committee. All Operating Budgets
        shall be updated by the Managing Partner, and the Managing Partner shall
        furnish a copy of the updated Operating Budget to each Partner, on or
        before the tenth (10th) day of the first month of each Calendar Quarter.
        The Operating Budget for the 

                                       41
<PAGE>

        1997 fiscal year of the Partnership shall be the Operating Budget
        attached hereto as EXHIBIT F.

               (b) The Management Committee shall notify the Managing Partner of
        its approval or disapproval of the Operating Budget within forty-five
        (45) days after receipt of such budget. If the Management Committee
        notifies or is deemed to have notified the Managing Partner of its
        disapproval of all of an Operating Budget, then, until the Management
        Committee has approved a revised budget, the Managing Partner is
        authorized to incur (1) costs set forth in any line item approved by the
        Management Committee and (2) any additional costs in connection with
        line items that were not approved by the Management Committee up to an
        aggregate amount of not more than the lesser of (x) 50 percent of the
        budget that was submitted by the Managing Partner but not approved by
        the Management Committee, less the amounts set forth in (1) above, and
        (y) the amount of the prior year's budget for such line item. If the
        Management Committee fails to notify the Managing Partner in writing of
        its approval or disapproval of any budget within forty-five (45) days
        after receipt of such budget or revised budget, then the Management
        Committee shall be deemed to have rejected such budget.

               (c) If, during the period covered by an approved Operating
        Budget, the Managing Partner determines that an adjustment to the
        estimated costs set forth in such Operating Budget is necessary or
        appropriate, then the Managing Partner shall submit to the Management
        Committee for approval an adjusted budget setting forth such adjusted or
        additional line items as are necessary or required. The same procedures
        set forth in SECTION 6.1(A) with regard to the approval of the annual
        Operating Budget shall apply to the approval of any adjusted costs
        budget, except that the Managing Partner may provide for a period less
        than forty-five (45) days, but not less than fifteen (15) days, in which
        the Management Committee shall approve or disapprove an adjusted budget,
        and the Management Committee's approval of an adjusted budget may be
        oral in order to expedite action, but such approval shall be followed
        immediately with written approval.

               (d) The Managing Partner is authorized to incur costs in excess
        of the amount budgeted in an approved Operating Budget or adjusted
        budget, and the Managing Partner is authorized to incur costs in
        connection with an unbudgeted item; provided that the Managing Partner
        may not incur such excess or unbudgeted costs in a total amount greater
        than 15 percent of the total amount set forth in the approved Operating
        Budget or adjusted budget, without the approval of the Management
        Committee. In addition, if any line 

                                       42
<PAGE>

        item variance from the budgeted amount exceeds an amount equal to the
        greater of 15 percent of the budgeted cost for that item or $50,000, or
        if the cost of an unbudgeted item exceeds the lesser of 15 percent of
        the total applicable budget or $50,000, then the Managing Partner shall
        advise the Management Committee in the next quarterly budget of any such
        variance from the approved Operating Budget, and the Managing Partner
        also shall provide the Management Committee with an explanation of the
        reason for such variance, and seek authorization from the Management
        Committee to expend additional funds on such line item.

        6.2 BUSINESS PLAN. Contemporaneously with the submission by the Managing
Partner of the Operating Budget, the Managing Partner shall submit a business
plan for the next fiscal year and subsequent two years that includes anticipated
new gathering activity for such years, anticipated revenues for such years,
anticipated capital expenditures for such years, anticipated cash calls during
such years, and anticipated cash distributions during such years.

        6.3 COSTS AND PAYMENT. The Managing Partner shall keep a full and
complete account of all costs and expenses incurred by it in connection with the
operation and maintenance of the Gathering System in accordance with the
procedures attached as EXHIBIT C (the "ACCOUNTING PROCEDURES"). The Partners
shall provide funds for all costs incurred in connection with the operation and
maintenance of the Gathering System in accordance with ARTICLE 5 of this
Agreement.

        6.4 PARTNERS' COOPERATION. Each Partner shall provide such documentation
as is required to perform the accounting set forth in the Accounting Procedures.

        6.5    COMPENSATION OF THE MANAGING PARTNER.

               (a) In accordance with the approved Operating Budget, the
        Partnership shall reimburse the Managing Partner for (1) wages and
        benefits of certain employees contracted for use by the Managing Partner
        in accordance with the Accounting Procedures, (2) for certain employee
        expenses and transportation of such employees in accordance with the
        Accounting Procedures, and (3) certain Managing Partner equipment and
        facilities costs in accordance with the Accounting Procedures.

               (b) The Partnership shall compensate the Managing Partner for any
        general and administrative costs (including salaries and benefits for
        office personnel) an amount equal to $62,500 per month beginning January
        1, 1997. The reimbursement amount set forth above shall be adjusted each

                                       43
<PAGE>

        year with the first adjustment occurring effective on January 1, 1998.
        The adjustments shall be computed by multiplying the rate currently in
        use by the percentage increase in the average weekly earnings of the
        Crude Petroleum and Gas Production Workers for the last calendar year
        compared to the preceding calendar year as shown by the Index of Average
        Weekly Earnings of Crude Petroleum and Gas Field Production Workers as
        published by the United States Department of Labor, Bureau of Labor
        Statistics. In addition to the foregoing, the Management Committee may
        annually revise the fee payable to the Managing Partner pursuant to
        SECTION 6.5(B) if the current fee payable is materially disproportionate
        to the services being rendered by the Managing Partner to the
        Partnership. The revision shall be effective as of January 1 of the year
        following the year in which the Management Committee elects to revise
        the fee. In the event the then acting Managing Partner disagrees with
        the fee proposed by the Management Committee, the Partnership shall
        continue to compensate the Managing Partner in an amount equal to the
        prior fee and the dispute shall be resolved by arbitration as provided
        in SECTION 15.11. In rendering their decision, the arbitrators shall
        consider fees being charged by other parties under similar
        circumstances. The fee awarded by the arbitrators shall be applied
        retrospectively to January of the year for which the new fee would have
        been effective and appropriate payment or reimbursement shall be made by
        the applicable party.

        To the extent that there is a substantial expansion of the Gathering
System after the Effective Date (other than the Phase I Extension), the general
and administrative expenses payable to the Managing Partner shall be augmented
as determined by the Management Committee to compensate the Managing Partner for
the additional general and administrative expenses related to such expansion. In
the event the Management Committee and the Managing Partner are unable to agree
on the amount of such augmentation, such matters shall be referred to
arbitration in accordance with the provisions of SECTION 15.11.

        6.6    COMPENSATION OF THE FINANCE PARTNER.

               (a) In accordance with the approved Operating Budget, the
        Partnership shall reimburse the Finance Partner for (1) wages and
        benefits of certain employees contracted for use by the Finance Partner
        in accordance with the Accounting Procedures, (2) for certain employee
        expenses and transportation of such employees in accordance with the
        Accounting Procedures, and (3) certain Finance Partner equipment and
        facilities costs in accordance with the Accounting Procedures.

                                       44
<PAGE>

               (b) The Partnership shall compensate the Finance Partner for any
        general and administrative costs (including salaries and benefits for
        office personnel) an amount equal to $10,000 per month from and after
        the Effective Date.

                                   ARTICLE 7.
                          ALLOCATIONS AND DISTRIBUTIONS

        7.1    REVENUE DISTRIBUTION.

               (a) The Finance Partner shall deposit, or cause to be deposited,
        all monies due to the Partnership and payable by third parties in an
        interest-bearing bank account managed by the Finance Partner for the
        benefit of the Partnership. Except as otherwise specifically provided in
        this Agreement or in related agreements associated with the financing of
        the Partnership, the Finance Partner shall pay, from those monies
        received, all expenses accrued by the Partnership on a current basis. At
        least monthly, by the last day of each month (commencing the first month
        after the receipt by the Partnership of its first revenues), all cash
        funds of the Partnership, other than funds provided by capital
        contributions which shall not be distributed, that the Management
        Committee reasonably determines are not needed for the payment of
        current Partnership obligations or significant Partnership expenditures
        known by the Managing Partner or the Finance Partner to be payable
        within the next ninety (90) day period shall be distributed to the
        Partners in proportion to their respective Ownership Interests.

               (b) The distributions provided in this Section are subject to the
        rights of the non-defaulting Partners under SECTION 5.6 to receive the
        distributions otherwise payable to a defaulting Partner.

               (c) Notwithstanding the foregoing or any other provision
        contained in this Agreement, (1) the Partnership may retain such
        insurance proceeds or proceeds contributed by self-insured Partners and
        other amounts as the Management Committee shall reasonably determine are
        necessary to pay Partnership liabilities and expenses and to restore,
        preserve and protect Partnership property upon the occurrence of an
        accident, catastrophe or similar event or to comply with all applicable
        environmental laws, ordinances, rules and regulations, and (2) the
        Partnership may retain amounts, as determined by the Management
        Committee, for the purpose of creating a reserve from which to pay the
        remainder of (i) the Partnership's share of the estimated cost of
        abandoning any facilities owned by the Partnership minus 

                                       45
<PAGE>

        (ii) the Partnership's share of the estimated fair market value of any
        salvageable materials, supplies, equipment and other personal property
        or fixtures located on or used in connection with the Partnership's
        facilities in excess of the Partnership's share of the estimated cost of
        salvage of such items.

               (d) All Partnership distributions shall be charged to each
        Partner's Capital Account.

        7.2 ALLOCATIONS OF PROFITS AND LOSSES. Subject to any special
allocations required by Treasury Regulations Sections 1.704-2(b), 1.704-2(i),
and 1.704-2(j)(2)(ii), relating to deductions and gains attributable to
Nonrecourse Deductions and Partner Nonrecourse Deductions (as those terms are
defined in such Regulations), the Partnership's items of income, gain, loss,
deduction, and credit shall be allocated among the Partners in each taxable year
(or portion thereof) in the same ratio in which Profits or Losses are allocated
as provided below:

               (a) Profits for any taxable year (or portion thereof) shall be
        allocated in the same ratio as the Partners are entitled to
        distributions from the Partnership under SECTION 4.9 or 7.1(A) hereof.

               (b) Losses for any taxable year (or portion thereof) shall be
        allocated among the Partners in proportion to their respective Ownership
        Interests for such taxable year (or portion thereof), except as provided
        in SECTION 4.9.

               (c) As used herein, "PROFITS" and "LOSSES" mean, for each taxable
        year or other period, an amount equal to the Partnership's taxable
        income or loss for such year or period, determined in accordance with
        Code Section 703(a) (for this purpose, all items of income, gain, loss,
        or deduction required to be stated separately pursuant to Code Section
        703(a)(1) shall be included in taxable income or loss), with the
        following adjustments:

                      (1) Any income of the Partnership that is exempt from
               federal income tax and not otherwise taken into account in
               computing Profits and Losses pursuant to this definition of
               Profits and Losses shall be added to such income or loss for the
               purpose of determining Partner Capital Accounts;

                      (2) Any expenditures of the Partnership described in Code
               Section 705(a)(2)(B) or treated as Code Section 705(a)(2)(B)

                                       46
<PAGE>

               expenditures pursuant to Regulations Section
               1.704-1(b)(2)(iv)(i), and not otherwise taken into account in
               computing Profits and Losses pursuant to this definition of
               Profits and Losses, shall be subtracted from such income or loss
               for the purpose of determining Partner Capital Accounts;

                      (3) In the event the Gross Asset Value of any Partnership
               asset is adjusted as required by the terms of the definition of
               Gross Asset Value hereof, the amount of such adjusted Gross Asset
               Value shall be taken into account in accordance with Regulation
               Section 1.704-1(b) for the purpose of determining Partner Capital
               Accounts;

                      (4) Gain or loss resulting from any disposition of
               Partnership assets with respect to which gain or loss is
               recognized for federal income tax purposes shall be computed by
               reference to the Gross Asset Value of the property disposed of in
               accordance with Regulation Section 1.704-1(b) for the purpose of
               determining Partner Capital Accounts, notwithstanding that the
               adjusted tax basis of such property differs from its Gross Asset
               Value;

                      (5) In lieu of the depreciation, amortization, and other
               cost recovery deductions taken into account in computing such
               taxable income or loss, for the purpose of determining Partner
               Capital Accounts there shall be taken into account Depreciation
               for such Fiscal Year or other period, computed in accordance with
               the definition of Depreciation herein;

                      (6) Notwithstanding any other provision of this definition
               of Profits and Losses, any items which are specially allocated
               pursuant to SECTIONS 7.2 OR 7.3 shall not be taken into account
               in computing Profits or Losses but shall be taken into account in
               computing Partner Capital Accounts.

               (d) As used herein, "GROSS ASSET VALUE" means, with respect to
        any asset, the asset's adjusted basis for federal income tax purposes,
        except as follows:

                      (1) The initial Gross Asset Value of any asset contributed
               by a Partner to the Partnership shall be the gross fair market
               value of such asset, as determined by the contributing Partner
               and the other 

                                       47
<PAGE>

               Partners; provided, that, the Partners hereby agree that any
               asset which is included in a Sole-Risk New System Project that is
               acquired by the Partnership pursuant to Section 4.9(d), shall be
               treated as if such asset was contributed to the Partnership by
               the Sole-Risk Partners with respect to such Sole-Risk New System
               Project and the Gross Asset Value of any such asset shall be its
               adjusted basis, or its Gross Asset Value if the asset is
               reflected on the books of the Sole Risk New System Project at
               other than its adjusted basis, for federal income tax purposes
               determined as of the time of such contribution (including,
               without limitation, for purposes of Section 8.3).

                      (2) The Gross Asset Values of all Partnership assets shall
               be adjusted to equal their respective gross fair market values,
               as determined by the Partners, as of the following times: (i) the
               acquisition of any additional interest in the Partnership by any
               new or existing Partner in exchange for more than a DE MINIMIS
               Capital Contribution; (ii) the distribution by the Partnership to
               a Partner of more than a DE MINIMIS amount of Partnership assets
               as consideration for an interest in the Partnership; and (iii)
               the liquidation of the Partnership within the meaning of
               Regulations Section 1.704- 1(b)(2)(ii)(g); PROVIDED, however,
               that adjustments pursuant to CLAUSES (I) AND (II) hereof shall be
               made only with the consent of all the Partners;

                      (3) The Gross Asset Value of any Partnership asset
               distributed to any Partner shall be the gross fair market value
               of such asset on the date of distribution, as determined by the
               Partnership; and

                      (4) The Gross Asset Value of Partnership assets shall be
               increased (or decreased) to reflect any adjustments to the
               adjusted basis of such assets pursuant to Code Section 734(b) or
               Code Section 743(b), but only to the extent that such adjustments
               are taken into account in determining Capital Accounts pursuant
               to Regulations Section 1.704-1(b)(2)(iv)(m) and SECTION 8.3
               hereof.

If the Gross Asset Value of an asset has been determined or adjusted pursuant to
the provisions of this SECTION 7.2(D), such Gross Asset Value shall thereafter
be adjusted by the Depreciation taken into account with respect to such asset
for purposes of computing Profits and Losses.

                                       48
<PAGE>

               (e) As used herein, "DEPRECIATION" means, for each taxable year,
        or other period, an amount equal to the depreciation, amortization, or
        other cost recovery deduction allowable with respect to any asset for
        such year or other period, except that if the Gross Asset Value of an
        asset differs from its adjusted basis for federal income tax purposes at
        the beginning of such year or other period, Depreciation shall be an
        amount which bears the same ratio to such beginning Gross Asset Value as
        the federal income tax depreciation, amortization, or other cost
        recovery deduction for such year or other period bears to such beginning
        adjusted tax basis; provided, however, that if the federal income tax
        depreciation, amortization, or other cost recovery deduction for such
        year is zero, Depreciation shall be determined with reference to such
        beginning Gross Asset Value using any reasonable method selected by the
        Partnership.

               (f) Except as provided in SECTION 7.3, all items of income, gain,
        loss, deduction and credit attributable to any Sole-Risk AMI Project
        shall be allocated as provided in SECTION 4.9.

               (g) All Depreciation with respect to Partnership assets shall be
        allocated as provided in SECTION 7.3.

        7.3 SPECIAL ALLOCATIONS OF DEPRECIATION. Depreciation with respect to
each Partnership asset placed into service by the Partnership on or before
December 31, 1996, shall be allocated among the Partners in proportion to their
Ownership Interests as of such date. Depreciation with respect to each
Partnership asset, including Partnership assets included in Sole Risk New System
Projects and Sole-Risk Extension Projects, placed into service by the
Partnership after December 31, 1996, shall be allocated among the Partners in
proportion to the percentage interests in which the Partners are allocated items
of income, gain, loss, and deduction with respect to the activity on which such
asset is engaged at the time it is placed into service. Changes to such
Ownership Interests and percentage interests occurring after a Partnership asset
is placed into service as a result of Payout or pursuant to Section 4.9 shall
not alter the manner in which Depreciation with respect to such asset is
allocated among the Partners.

        7.4 CURATIVE AMENDMENT. Notwithstanding any other provision of this
Agreement, the allocations herein shall effect an allocation for federal income
tax purposes in a manner consistent with Section 704(b) and the regulations
promulgated thereunder. If for any reason the allocations conflict with the
regulations under Section 704(b), the Tax Matters Partner may amend these
provisions to the extent necessary to reflect allocations consistent with the
regulations.

                                       49
<PAGE>

        7.5 SECTION 704(C). In accordance with Internal Revenue Code ss. 704(c)
and the Treasury Regulations thereunder and Treasury Regulations Section
1.704-1(b)(i), income, gain, loss and deduction with respect to any property
with a Gross Asset Value which differs from its adjusted tax basis, shall,
solely for tax purposes and not for purposes of determining Capital Accounts, be
allocated among the Partners so as to take account of any variation between the
adjusted basis to the Partnership for federal income tax purposes and its fair
market value. The Partners agree to use the traditional method with curative
allocations under Regulation Section 1.704-3(c) for this purpose.

        7.6 TRANSFERS. The allocation of items of income, gain, loss, deduction
and credit attributable to a partnership interest that is assigned during the
year will be done in accordance with Section 706(d). If more than one method is
permitted, the Tax Matters Partner can determine the method of allocation,
taking into account both the desire to match income and deductions and ease of
administration.

                                   ARTICLE 8.
                                   ACCOUNTING

        8.1 FISCAL YEAR. The fiscal year of the Partnership shall be the
calendar year.

        8.2 BOOKS OF ACCOUNT. The books of account of the Partnership shall be
maintained and adjusted, so far as is practicable, at the principal place of
business of the Finance Partner, or, if requested by the Finance Partner, at
such other place or places as may be approved by the Management Committee from
time to time. The books of account shall be maintained and adjusted as permitted
by GAAP, consistently applied, and shall show all items of investment, income
and expense. Each of the Partners shall have reasonable access to the books,
records, data and information of the Partnership (including information
maintained by the Managing Partner and the Finance Partner) at any time during
normal business hours. Monthly statements of income and expense shall be
prepared by the Finance Partner and shall be furnished to the Partners along
with a statement of cash distributions made in accordance with ARTICLE 7. As
soon as practicable, but not later than June 1 of each year, the Finance Partner
shall cause to be delivered to each Partner such federal, state and local income
tax returns and such other accounting tax information and schedules as shall be
necessary for the preparation by each Partner of its income tax returns for such
fiscal year. As soon as practicable, but not later than one hundred twenty (120)
days following the end of each of the Partnership's fiscal years, the Finance
Partner shall cause to be delivered to each Partner a profit and loss statement,
a statement of cash flows for such fiscal year, a balance sheet and a statement
of each Partner's capital account as of the end of such fiscal year together
with an audit report thereon by Deloitte & Touche LLP, for the 1996 and 1997
fiscal years, and the nationally recognized firm of

                                       50
<PAGE>

independent certified public accountants selected by the Management Committee
for subsequent years.

        8.3 TAX CAPITAL ACCOUNTS. A capital account ("CAPITAL ACCOUNT") shall be
established and maintained for each Partner. Each Partner's Capital Account
shall be maintained in the following manner:

               (a) To each Partner's Capital Account there shall be credited the
        amount of cash and the value as determined by the Partners of any asset
        contributed to the Partnership by such Partner (including assets which
        are part of a Sole Risk New System Project that is acquired by the
        Partnership pursuant to Section 4.9(d)), such Partner's distributive
        share of Profits, any items in the nature of income or gain which are
        specially allocated pursuant to SECTION 7.2 hereof, and the amount of
        any Partnership liabilities assumed by such Partner or which are secured
        by any asset of the Partnership distributed to such Partner.

               (b) To each Partner's Capital Account there shall be debited the
        amount of cash and the value as determined by the Partners of any
        Partnership asset distributed to such Partner pursuant to any provision
        of this Agreement, such Partner's distributive share of Losses, any
        items in the nature of expenses or losses which are specially allocated
        pursuant to SECTIONS 7.2 AND 7.3, and the amount of any liabilities of
        such Partner assumed by the Partnership or which are secured by any
        property contributed by such Partner to the Partnership.

               (c) In the event all or a portion of an interest in the
        Partnership is transferred in accordance with the terms of this
        Agreement, the transferee shall succeed to the Capital Account of the
        transferor to the extent it relates to the transferred interest in the
        Partnership.

               (d) In determining the amount of any liability for purposes of
        this definition of Capital Accounts, there shall be taken into account
        Code Section 752(c) and any other applicable provisions of the Code and
        Regulations.

                                       51
<PAGE>

               (e) The Partners agree that as of January 1, 1997, the balance in
        each Partner's Capital Account shall be as follows:

                      DIGC                  $ 1,350,000.00

                      MMBGC                  46,650,000.00

                      PDI                    32,000,000.00

                      Centana                18,333,333.33

                      CNG                    18,333,333.33

                      Coastal                18,333,333.33

The foregoing provisions and the other provisions of this Agreement relating to
the maintenance of Capital Accounts and allocations are intended to comply with
Regulations Sections 1.704-1(b) and 1.704-2, and shall be interpreted and
applied in a manner consistent with such Regulations.

        8.4 SURVIVAL OF TAX PROVISIONS. The provisions of this Agreement
relating to tax matters shall survive the termination of this Agreement and the
termination of any Partner's interest in this Partnership and shall remain
binding on the Partner for the period of time necessary to resolve with any
federal, state and local tax authorities any tax matter regarding the
Partnership.

        8.5 AUDIT. Each Partner shall have the right at any time during and up
to 24 months after the close of any fiscal year, but not more than once in any
12 month period, to audit, examine and make copies of or extracts from the books
of account or any other records of a Partner, the Managing Partner, the Finance
Partner or the Partnership relating to the Partnership pertaining to that fiscal
year. Such right may be exercised during normal business hours through any agent
or employee of a Partner, the Managing Partner or the Finance Partner designated
by the Partner, the Managing Partner or the Finance Partner or by an independent
certified public accountant designated by the Partner, the Managing Partner or
the Finance Partner. Such Partner, the Managing Partner or the Finance Partner,
as applicable, shall bear all expenses incurred in any such examination or
audit.

        8.6 ACCOUNTING PROCEDURES. The Partners adopt the Accounting Procedures.

                                       52
<PAGE>

                                   ARTICLE 9.
                            GATHERING SYSTEM CAPACITY

        9.1 PARTNERSHIP OWNED CAPACITY. Nothing in this Agreement shall (a)
commit or entitle any Partner or any of its Affiliates to gather gas owned by,
or committed to be sold to, such Partner or Affiliate through the Gathering
System solely by reason of the Partner being a Partner in the Partnership
regardless of the location of such Partner's or Affiliate's owned or controlled
gas reserves or the markets to which such gas is to be delivered, or (b) limit
the availability of gas gathering service only to those producers which are
Partners or Affiliates of Partners. System capacity for gathering shall be made
available pursuant to gathering agreements with various producers to be entered
into by the Managing Partner on behalf of the Partnership pursuant to terms,
conditions and rates set by the Management Committee under SECTION 3.4(F). The
firm capacity rights of customer producers on the DIGS or Main Pass System
existing prior to the Effective Date shall not be infringed upon.

        9.2 AFFILIATE COMMITMENT. Each Partner agrees to assist the Partnership
to facilitate negotiation of gathering agreements with Affiliates of such
Partner who are oil and gas producers to commit to the Partnership any
uncommitted oil and gas leases owned by such Affiliates covering areas located
(or any part thereof) in the AMI from which the production can reasonably be
expected to be delivered to the Gathering System.

                                   ARTICLE 10.
                              TERM AND TERMINATION

        10.1 TERM. The Partnership was formed January 14, 1993, and shall be
deemed to be continuing under the terms of this Agreement as of the Effective
Date. The Partnership shall continue in existence for a primary term of 30 years
from the Effective Date and thereafter for successive periods of one year;
provided, that any Partner may elect to dissolve the Partnership and this
Agreement as of the end of such 30-year period or as of December 31 of each year
after such 30-year period by giving the other Partners written notice of such
election not less than one year prior to the date such termination is to take
effect.

        10.2   [INTENTIONALLY LEFT BLANK]

        10.3 OTHER REASONS FOR DISSOLUTION. The Partnership shall automatically
and without notice be dissolved upon the happening of any of the following
events (unless the applicable event is listed in SECTIONS 10.3(A), 10.3(B),
10.3(C), 10.3(D) OR 10.3(G) and on or before ninety (90) days after the
occurrence of such event, all of the unaffected Partners waive such event in
writing and elect not to dissolve the Partnership):

                                       53
<PAGE>

               (a) Proceedings shall be commenced by or against any of the
        Partners (or general partner of a Partner) for any relief under any
        bankruptcy or insolvency law, or any law relating to the relief of
        debtors, readjustment of indebtedness, reorganization, arrangement,
        composition or extension; and, if such proceedings have been commenced
        by a person other than a Partner against any Partner (or general partner
        of a Partner), such proceeding shall not have been dismissed, nullified,
        stayed or otherwise rendered ineffective (but then only so long as such
        stay shall continue in force or such ineffectiveness shall continue)
        within ninety (90) days after such proceedings shall have been
        commenced.

               (b) A decree or order of a court having jurisdiction in the
        premises for the appointment of a receiver or liquidator or trustee or
        assignee in bankruptcy or insolvency of a Partner (or general partner of
        a Partner) or of a substantial part of a Partner's property, or for the
        winding up or liquidation of its affairs, shall have been entered, and
        such decree or order shall have remained in force undischarged and
        unstayed for a period of ninety (90) days, or any substantial part of
        the property of a Partner (or general partner of a Partner) shall be
        sequestered or attached and shall not be returned to the possession of
        such Partner (or general partner of a Partner) or released from such
        attachment within ninety (90) days thereafter.

               (c) A Partner (or general partner of a Partner) shall make a
        general assignment for the benefit of creditors or shall admit in
        writing its inability to pay its debts generally as they become due.

               (d) The filing of a certificate of dissolution by a Partner (or
        general partner of a Partner) under the laws of the State of its
        incorporation or partnership, or the entering of a final order
        dissolving any Partner by any court of competent jurisdiction.

               (e) The sale or abandonment of all or substantially all of the
        Partnership's business and assets.

               (f) Any event which shall make it unlawful for the business of
        the Partnership to be carried on or for the Partners to carry on such
        business in partnership.

               (g) A Partner withdraws from the Partnership.

                                       54
<PAGE>

        10.4   WINDING UP.

               (a) Upon a dissolution of the Partnership, the Partners shall
        undertake the sale or abandonment of all of the Partnership's business
        and assets, and each Partner shall bear its proportionate share (based
        on each Partner's Ownership Interest) of all costs and expenses incurred
        in connection with winding up the Partnership business and with
        abandonment or sale of the Gathering System. In the event of
        dissolution, the Managing Partner, or if the Managing Partner caused the
        dissolution, then whichever Partner chosen by the Management Committee,
        shall be the liquidator of the Partnership. The Management Committee
        shall determine, among other things, arrangements with creditors, the
        extent to which assets should be sold or distributed in kind and the
        amount of any reserve for contingent liability. After the Partnership
        shall be dissolved pursuant to the provisions of this ARTICLE 10, the
        Managing Partner shall continue to exercise the powers vested in it by
        this Agreement and continue to operate the Gathering System in the
        normal course to the extent appropriate for the purpose of winding up
        the business of the Partnership and liquidating the assets thereof in an
        orderly manner, but the Managing Partner shall engage in no new business
        on behalf of the Partnership during the period of such winding up.

               (b) After the payment of debts or otherwise providing for the
        liabilities of the Partnership, the liquidator will distribute any
        remaining assets of the Partnership as follows:

                      (1) Cash or cash equivalents shall be distributed (i)
               first, to the Partners in proportion to their respective positive
               Capital Account balances, if any, and (ii) second, to each
               Partner in proportion to its Ownership Interest.

                      (2) Interests in the Gathering System and other tangible
               assets shall be sold by the liquidator on such terms as are
               approved by the Management Committee, or if the Management
               Committee elects not to sell any such assets, or if such sale is
               not consummated within a period deemed reasonable by the
               Management Committee, such assets shall be distributed to each
               Partner in proportion to its Ownership Interest, and each Partner
               shall execute an operating agreement governing operation of such
               assets containing operating and economic terms substantially
               similar to these contained in this Agreement.

                                       55
<PAGE>

               (c) On liquidation of the Partnership or a Partnership interest
        within the meaning of Treasury Regulation Section 1.704-1(b)(2)(ii)(g),
        each Partner having a deficit balance in its Capital Account (after
        giving effect to all contributions, distributions, and allocations for
        all fiscal years, including the fiscal year of the liquidation) shall
        contribute to the Partnership the amount necessary to restore the
        deficit balance in such Capital Account to zero in compliance with
        Regulation Section 1.704-1(b)(2)(ii)(b)(3). Such contribution shall be
        made no later than the end of the taxable year in which the liquidation
        occurred (or, if later, within ninety (90) days after the date of
        liquidation). The contribution shall not be used to pay nonrecourse
        liabilities but shall be used to pay any other Partnership liabilities
        and then shall be distributed to the other Partners in accordance with
        the positive balance in such Partners' Capital Accounts.

               (d) No dissolution of the Partnership shall relieve any Partner
        from any obligation accruing or accrued prior to the date of such
        dissolution or as a result of such dissolution or deprive any Partner
        not in default hereunder of any remedy otherwise available to it.

        The term "DISSOLUTION" as used in this Agreement shall mean "an event
        requiring a winding up" as such terms are used in the Partnership Act.

        10.5 RIGHT TO WITHDRAW. A Partner (herein called a "WITHDRAWING
PARTNER") shall have the right to withdraw from the Partnership at any time by
giving written notice (herein called "WITHDRAWAL NOTICE") to the other Partners
and to the Partnership. In the event of such withdrawal, the Partnership shall
retain all contributions theretofore made by the Withdrawing Partner. In
addition, such Withdrawing Partner, regardless of the time of the delivery of
the Withdrawal Notice shall pay to the Partnership its share of all cost,
expense, obligation and liability that (a) were accrued or otherwise
attributable to the period prior to the time of the giving of the Withdrawal
Notice, (b) were incurred prior to the time of the giving of the Withdrawal
Notice regardless of the periods of time to which such cost, expense, obligation
and liability relates, including any obligations attributable to the work
performed or actions taken or authorized by the Management Committee or the
Managing Partner prior to the time of the giving of the Withdrawal Notice, and
(c) are to be incurred by the Partnership as a result of actions taken or
authorized by the Management Committee or the Managing Partner prior to the time
of the giving of the Withdrawal Notice (the "WITHDRAWING PARTNER OBLIGATIONS").
The Withdrawing Partner shall post a deposit in an amount set by the Management
Committee (without the Withdrawing Partner voting thereon) to cover the
Withdrawing Partner's share of the estimated future pipeline abandonment costs
(including environmental clean-up costs) and Partnership liquidation costs. The
deposit will be applied to the Withdrawing Partner's actual share of such costs

                                       56
<PAGE>

when they are ultimately incurred with the Withdrawing Partner remaining liable
for its share of the ultimate costs if they are greater than the deposit. If the
deposit is greater than the Withdrawing Partner's actual share, the difference
will be refunded. Withdrawal shall (a) be effective as of the date of giving of
the Withdrawal Notice (i.e. latest date received by all Partners and the
Partnership), (b) terminate the Withdrawing Partner's status as a Partner, (c)
forfeit all voting rights of the Withdrawing Partner in Partnership affairs, (d)
terminate all representation of the Withdrawing Partner on the Management
Committee and other Partnership committees, and (e) result in a pro rata
increase of the remaining Partners' Ownership Interests based on the ratio of
their then present Ownership Interests. The non- Withdrawing Partners shall
indemnify and hold harmless the Withdrawing Partner, against any costs,
expenses, obligations and liabilities of the Partnership that are attributable
to periods after the effective date of the withdrawal other than Withdrawing
Partner Obligations and demobilization costs and liquidation costs.

        10.6 DEEMED DISTRIBUTION AND RECONTRIBUTION. Notwithstanding any other
provision of this ARTICLE 10, in the event the Partnership is liquidated within
the meaning of Regulation Section 1.704-1(b)(2)(ii)(g) but no actual liquidation
has occurred, the property shall not be liquidated, the Partnership's
liabilities shall not be paid or discharged, and the Partnership's affairs shall
not be wound up. Instead, the Partnership shall be deemed to have distributed
the property in kind to the Partners, who shall be deemed to have assumed and
taken subject to all Partnership liabilities, all in accordance with their
respective Capital Accounts, and if any Partner's Capital Account has a deficit
balance (after giving effect to all contributions, distributions, and
allocations for all fiscal years, including the fiscal year during which such
liquidation occurs), such Partners shall contribute to the capital of the
Partnership the amount necessary to restore such deficit balance to zero in
compliance with Regulation Section 1.704-1(b)(2)(ii)(b)(3). Immediately
thereafter, the Partners shall be deemed to have recontributed the property in
kind to the Partnership, which shall be deemed to have assumed and taken the
property subject to all such liabilities.

                                   ARTICLE 11.
                       OPTION AND PRIOR RIGHT TO PURCHASE.

        11.1   DISPOSITIONS.

               (a) Each Partner agrees that it shall not sell, transfer, assign
        or in any way alienate all or any portion of its Ownership Interest in
        the Partnership or any right or interest therein, whether voluntarily or
        by operation of law, or by gift, merger, consolidation, a Change of
        Control (which for purposes of this ARTICLE 11, with respect to DIGC,
        shall mean a Change of Control as defined in SECTION 3.8(B)(Y) rather
        than a DIGC Change of Control) or otherwise, (hereinafter referred to as
        "DISPOSE" or a

                                       57
<PAGE>

        "DISPOSITION"), except for a Disposition which complies with the
        requirements of this SECTION 11.1.

               (b) Subject to the express provisions of SECTION 11.1(C) below
        excepting certain Dispositions, should any Partner decide to Dispose of
        any portion of its Ownership Interest in the Partnership directly or
        indirectly, such Partner (the "SELLING PARTNER") shall first give
        written notice to the other Partners (the "NON-SELLING PARTNERS") of its
        intent to Dispose of its interest and of the quantum of interest to be
        Disposed. Each of the Non-Selling Partners shall have the right to make
        an offer in writing to purchase the entire Ownership Interest offered to
        be Disposed. Such offer must be made on or before fifteen (15) days
        after the date of receipt of notification of intent to transfer by the
        Selling Partner. The Selling Partner may, in its sole discretion, elect
        to either accept or reject any such offer, except that if such an offer
        is accepted, the Selling Partner must accept the offer of the greatest
        value, and any offers of equal value, in the proportion of the Ownership
        Interests of any Non-Selling Partners whose offers are so accepted bears
        to the aggregate interest of such Partners whose offers are accepted.
        The Selling Partner shall notify the Non-Selling Partner of its election
        to accept or reject an offer in writing on or before fifteen (15) days
        of its receipt of the written offer. If the Selling Partner accepts the
        offer of one or more Non-Selling Partners, the Non- Selling Partners
        whose offers have been accepted shall have forty-five (45) days from
        receipt of notification of acceptance to complete their respective
        purchases. Should the Selling Partner reject an offer of a Non-Selling
        Partner or not receive timely an offer from a Non-Selling Partner, the
        Selling Partner shall have the right for a period of one hundred eighty
        (180) days following the expiration of the fifteen (15) day period
        referred to above, to Dispose to a third party of that portion of its
        Ownership Interest covered by such offer subject, however, in the case
        in which an offer had been made by a Non- selling Partner, to a minimum
        price requirement equivalent to the highest rejected offer of the
        Non-Selling Partners.

               (c) The other provisions of this SECTION 11.1 shall not apply to
        (1) a sale or transfer to an Affiliate, in which case, the Selling
        Partner shall be jointly and severally liable with such Affiliate for
        all of its obligations pursuant to this Agreement, (2) a sale or
        transfer to a publicly traded entity formed for the purpose of acquiring
        (directly or indirectly) the Ownership Interest of the Selling Partner,
        nor (3) a sale, at the sole and exclusive option and discretion of DIGC,
        to any Partner of the pro rata portion of the DIGC After Payout Interest
        that burdens the Ownership Interest of such Partner.

                                       58
<PAGE>

               (d) In cases where all or a portion of the consideration to be
        received in connection with a Disposition is other than cash, (including
        property, note, defined cash payment or other non-cash assets), the cash
        value of that consideration shall be determined: (1) by mutual agreement
        of the Selling Partner and the Non-Selling Partners or (2) failing such
        mutual agreement, within three (3) business days following receipt by
        either the Non- Selling Partner or the Selling Partner of a notice to
        the other that it desires such determination to be made by independent
        appraisal (to be obtained at the sole cost of the Selling Partner), by a
        qualified independent appraiser selected by mutual agreement of the
        Selling Partner and the Non-Selling Partners, or (3) failing mutual
        agreement for the selection of an independent appraiser within three (3)
        business days after the receipt of the notice referenced in SUBCLAUSE
        11.1(D)(2), by independent appraisal (obtained at the sole cost of the
        Selling Partner) by a qualified appraiser selected by the Chief Judge of
        the United States District Court for the Southern District of Texas, or
        in the event such judge disqualifies himself or herself, the most senior
        judge of such court who does not disqualify himself or herself.

               (e) Notwithstanding the foregoing, any Disposition other than (1)
        a Disposition to a Non-selling Partner whose offer has been accepted as
        provided in SECTION 11.1(B) or (2) those referenced in SECTION 11.1(C)
        shall require Super Majority Approval, excluding the vote of the Selling
        Partner. Such Super Majority Approval shall not be unreasonably
        withheld. A Selling Partner shall request the Non-Selling Partners in
        writing to approve such Disposition. Within five (5) business days after
        receipt of such notice by each Non-Selling Partner, such Non-Selling
        Partner shall notify the Selling Partner in writing whether or not it
        approves such Disposition. Failure by a Non- Selling Partner to timely
        notify the Selling Partner shall be deemed approval of the Disposition.
        If any Partner elects to not approve such Disposition, it shall specify
        the reasonable grounds upon which it is objecting to such Disposition.
        Failure to specify such grounds shall be deemed an election by such
        Partner to approve the Disposition.

        11.2 TAG ALONG RIGHTS. Prior to Payout as to MMBGC and PDI, for so long
as the Ownership Interest of DIGC does not exceed one percent (1%), if either
such Partner (MMBGC or PDI) proposes to convey or transfer all of its interest
in the Partnership, directly or indirectly through a sale of such Partner or
otherwise, to any person or entity other than (1) a Partner or (2) an Affiliate
of any Partner (including an Affiliate of such Partner) (a "PROPOSED
PURCHASER"), DIGC shall have the right, but not the obligation, to require that
the Proposed Purchaser purchase all of DIGC's interest in the Partnership at the
same price and on the same terms and conditions as those that have been
negotiated by such Partner.

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Any binding agreement entered into by such Partner with a Proposed Purchaser
shall provide for the right of DIGC to convey all of its interest in the
Partnership to the Proposed Purchaser as provided herein. Upon execution of a
binding agreement with a Proposed Purchaser, such Partner shall notify DIGC in
writing that it has elected to convey all of its interests in the Partnership,
together with a copy of the agreement with the Proposed Purchaser. DIGC shall,
not later than ten (10) days after receipt of such notice, notify such Partner
in writing whether it elects to convey all of its interest in the Partnership.
Failure to notify such Partner as provided herein shall constitute an election
by DIGC not to convey its interest in the Partnership.

                                   ARTICLE 12.
                                      TAXES

        12.1   TAXES.

               (a) The Finance Partner shall cause to be paid all valid
        applicable taxes and fees, other than local, state and federal income
        taxes, levied upon the Partnership or in connection with its operations,
        including but not limited to sales, use, excise and property taxes. To
        the extent not paid from Partnership funds, either the Managing Partner
        or the Finance Partner may make cash calls on each Partner for its
        proportionate share of all such payments. The Finance Partner shall
        render for ad valorem taxation all property subject to this Agreement
        which by law should be rendered for such taxes and pay all such taxes
        assessed thereon before they become delinquent. If any tax assessment is
        considered unreasonable by the Finance Partner, it may at its discretion
        protest such valuation or make payment under protest within the time and
        manner prescribed by law, and it may at its discretion prosecute, or not
        prosecute, the protest to a final determination. When any such protested
        valuation or payment shall have been finally determined, the Finance
        Partner shall pay from Partnership funds the assessment on the
        Partnership, if any such remains unpaid, together with costs of protest
        or prosecution and any interest and penalty accrued.

               (b) The Partners intend that the Partnership shall be treated as
        a "partnership" for income tax purposes, and the Partners agree to take
        all actions, including the amendment of this Agreement and the execution
        of such other documents as may be required to qualify for and receive
        such tax treatment. The Finance Partner shall be the Tax Matters Partner
        of the Partnership as described in ss.6231(a)(7) of the Internal Revenue
        Code of 1986 (the "CODE") ("TAX MATTERS PARTNER"). The Tax Matters
        Partner shall prepare and file all federal, state and municipal income
        tax returns to be filed

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        on behalf of the Partnership on an accrual basis. The Tax Matters
        Partner shall inform all Partners of all matters which may come to its
        attention in its capacity as Tax Matters Partner by giving them notice
        thereof within fifteen (15) days after becoming so informed. All
        Partnership elections for federal, state and municipal tax purposes
        shall be determined by the Tax Matters Partner. All Partners shall be
        entitled to participate in any IRS proceedings at their expense. The Tax
        Matters Partner on behalf of the Partnership shall make the election
        under Section 754 of the Code. The affairs of the Partners and the
        Partnership with regard to Federal income taxes shall be subject to the
        terms and conditions of EXHIBIT D attached hereto.

                                   ARTICLE 13.
                              INSURANCE AND LOSSES

        13.1 INSURANCE. The Finance Partner shall obtain and maintain for the
protection and benefit of the Partnership and itself the following minimum
insurance coverage with a carrier having a Best's rating of A- or better:

               (a) Worker's Compensation Insurance to cover the employees of the
        Employing Unit, as defined below, performing services for the
        Partnership in accordance with the requirements of the laws of the State
        of Alabama, or other applicable state and Employer's Liability Insurance
        with limits of not less than $1,000,000 aggregate for each accident and
        $1,000,000 aggregate for each disease. The Finance Partner or its
        parent, subsidiary or other affiliated companies shall diligently
        proceed to acquire Worker's Compensation Insurance and Employer's
        Liability Insurance that permit endorsement of such policies to include
        alternate employer/borrowed servant coverage and shall provide such
        endorsement to the Partners. Such policy shall be endorsed to provide
        all coverage applicable to persons working offshore. It is the intent of
        the Partnership and the Partners that for the sole purpose of statutory
        worker's compensation coverage, the Partnership, the Partners, and
        Affiliates of the Partners providing labor which inures to the benefit
        of the Partnership are to be treated as an Employing Unit (the
        "Employing Unit"). The Partners are united for a common purpose and any
        labor which is provided by a Partner or an Affiliate of a Partner for
        the Partnership will inure to the benefit of the others. All employees
        of the Partners and all employees of Affiliates of the Partners
        providing labor which benefits the Partnership are employed by this
        Employing Unit for purposes of worker's compensation coverage.

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               (b) Comprehensive General Liability and Property Damage Liability
        insurance with a combined single limit for each occurrence for bodily
        injury and property damage of not less than $5,000,000. Such insurance
        will include Contractual Liability, Products and Completed Operations,
        Independent Contractors, Broad Form Property Damage, Premises and
        Operations, Personal Injury and Advertising Injury and deletion of
        explosion, collapse and underground exclusions.

               (c) Automobile Public Liability Insurance, including owned,
        hired, rented or non-owned automotive equipment, with a combined single
        limit each occurrence for bodily injury and property damage of at least
        $1,000,000.

               (d) Property insurance for the assets of the Partnership written
        with limits of not less than the replacement cost of the assets.

        Each policy of insurance obtained pursuant to the provisions of SECTIONS
13.1(A), 13.1(B), 13.1(C), AND 13.1(D) shall provide by endorsement or otherwise
that the provisions of the policy are extended to cover the interests of the
parties hereto. Each policy of insurance pursuant to the provisions of SECTIONS
13.1(A), 13.1(B), 13.1(C), AND 13.1(D) shall contain an endorsement providing
that insurance carriers shall have no right of subrogation against the Partners,
their respective parents, subsidiaries, and affiliated companies and shall name
the Managing Partner and the Partners and their respective parents, subsidiaries
and affiliated companies as additional insureds. In the event that the Managing
Partner contracts with a third party for the provision of any service or
services for the Partnership, that third party shall be required to carry
insurance with subrogation waivers equal to or in excess of the requirements
herein and shall be required to contractually indemnify and hold harmless the
Partnership from tort liability arising from its performance and the negligence
of the Partners, the Partnership and their respective parents, subsidiaries and
affiliated companies and on all policies name the Managing Partner and the
Partners and their respective parents, subsidiaries and affiliated companies as
additional insureds. The Finance Partner shall furnish to the Partners a
certificate covering each policy of insurance obtained pursuant to this Section.
The Managing Partner may settle or defend any insured or uninsured claims on
behalf of the Partnership subject to the monetary limits in ARTICLE 3 or, if
applicable, subject to approval of the Management Committee.

        13.2 COST OF INSURANCE. The Finance Partner shall submit a statement to
the Partnership of insurance premium costs and expenses associated with the
insurance policies provided hereunder. The Partnership shall promptly reimburse
the Finance Partner for such costs and expenses.

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        13.3 INDEMNIFICATION OF PARTNERS. Except as provided in SECTION 15.12,
(1) all liability, loss, damage, claim or expense for which the Partnership is
responsible and not covered by insurance or in excess of insurance actually
carried shall be borne by the Partners proportionately based on their Ownership
Interests, and (2) the Partnership shall indemnify and hold harmless each
Partner against any claim made against any of them by a third party alleging
liability while acting on behalf of the Partnership in accordance with this
Agreement or based on the Partner's status as a Partner, together with the costs
reasonably incurred for the defense of such claim, except with respect to such
claims that arise from gross negligence or willful misconduct. The indemnified
party shall be indemnified and reimbursed first from the assets of the
Partnership. In the event that the amount of such indemnity or reimbursement
exceeds the amount available from the assets of the Partnership, each Partner
shall severally contribute its proportionate share of the excess based on its
Ownership Interest.

        13.4 LOSS OF OR DAMAGE TO PARTNERSHIP PROPERTY. The Partners shall be
responsible in proportion to their respective Ownership Interests for any
uninsured casualty loss of or damage to Partnership property, unless such loss
or damage is caused by the gross negligence or willful misconduct of a Partner
and in such case, such Partner shall be liable therefor.

        13.5 SELF INSURANCE. Notwithstanding the foregoing provisions of this
ARTICLE 13, any Partner may elect, by written notice to the Finance Partner, to
self insure its proportionate share of losses that would be covered by the
property casualty insurance purchased by the Finance Partner under SECTION
13.1(D). If a Partner so elects, the Partner shall not be required to reimburse
the Partnership for its share of the cost of such insurance and shall be
responsible for its proportionate share of losses covered by such property
casualty insurance.

                                   ARTICLE 14.
                     INVOLUNTARY DISSOLUTION AND CONTINUANCE

        14.1 CONTINUANCE OF RELATIONSHIP. It is understood and agreed by each of
the Partners that the relationship among them shall be a Partnership until such
relationship is either specifically terminated by the written consent of all of
the Partners or by one of the provisions hereof. If, notwithstanding such
understanding and agreement, the Partnership is deemed terminated or dissolved
by operation of law, each of the Partners hereby covenants and agrees that:

               (a) The business and affairs of the Partnership shall continue
        without interruption and be carried out by a new partnership upon the
        approval of a majority of the Partners (the "SUCCESSOR PARTNERSHIP").

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<PAGE>

               (b) The Partners of the Successor Partnership shall be the
        Parties who were Partners hereunder at the time of such termination or
        dissolution, and the Successor Partnership and the Partners thereof
        shall be governed by the terms of this Agreement as if the Successor
        Partnership were the Partnership.

               (c) Each of the Partners shall execute such further agreements
        including notes, notations and accommodations as may be necessary to
        continue the business of the Partnership and to protect and perfect any
        lien or security interest granted by the Partnership.

               (d) Notwithstanding the foregoing, if for any reason the business
        and affairs of the Partnership cannot be carried out as a Successor
        Partnership and any Partner determines to proceed with the business of
        the Partnership, then the other Partners at the time of dissolution
        shall be entitled to join with such Partner in such other entity or
        entities as may be used to own and operate the Gathering System, to the
        same extent and on a similar basis as provided in this Agreement, taking
        full account of the respective capital contributions theretofore made by
        such Partners to the Partnership.

                                   ARTICLE 15.
                                  MISCELLANEOUS

        15.1 LAWS AND REGULATIONS. This Agreement and all operations hereunder
shall be subject to all valid and applicable federal and state laws and to the
valid and applicable orders, laws, rules and regulations of any state or federal
authority having jurisdiction, but nothing contained herein shall be construed
as a waiver of any right to question or contest any such order, law, rule or
regulation in any forum having jurisdiction in the premises.

        15.2   CONTROLLING LAW.  THIS AGREEMENT SHALL BE GOVERNED, INTERPRETED
AND CONSTRUED UNDER THE STATUTORY AND COMMON LAW OF THE STATE OF
TEXAS, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS.

        15.3 FORCE MAJEURE. Performance, other than to make payments when due,
under this Agreement by any Partner shall be excused upon written notice, to the
other Partners, if such performance is prevented by war, blockades,
insurrection, strikes or differences with workers, riots, disorders, epidemics,
landslides, lightning, earthquakes, fires, storms, floods, washouts, civil
disturbances, blowouts, explosions, breakage or accident to machinery or lines
of pipe, acts of God or of the public enemy, acts of governmental authorities,
state and federal regulations, inability or delay in obtaining rights-of-way,
permits, easements or material and, without limitation by enumeration, any other
cause or happening whether of 

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<PAGE>

the kind enumerated herein or otherwise not reasonably within the control of
such Partner. The affected Partner shall use reasonable diligence to remedy such
cause and resume performance within a reasonable time after such cause has been
removed; and provided further, that no party shall be required against its will
to adjust any labor dispute.

        15.4 NOTICES. Unless herein provided to the contrary, any notice called
for in this Agreement shall be in writing and shall be considered as having been
given on the date of receipt if delivered personally or by mail or fax with all
postage and charges prepaid to the Managing Partner or Partner affected by such
notice at the place designated. Routine communications, including monthly
statements and payments, shall be considered as duly delivered when deposited in
the U.S. mail, first class, postage prepaid. Non-routine communications shall be
deemed received on the actual date of receipt by the addressee. Normal operating
instructions can be made by telephone. Unless changed by notice in writing to
the Managing Partner, the Finance Partner and all Partners, the addresses of the
parties are as follows:

               if to MCNIC Mobile Bay Gathering Company, to:
                      Attn: Vice President
                      c/o Pipeline & Processing Group, Inc.
                      150 W. Jefferson, Suite 1700
                      Detroit, Michigan 48226

               if to PanEnergy Dauphin Island Company, to:
                      Attn: Vice President - Offshore
                      5718 Westheimer, Suite 2000
                      Houston, Texas 77057

               if to CNG Main Pass Gas Gathering Corporation, to:
                      Attn: Vice President, Supply and Producing Services
                      Park Ridge Center
                      Pittsburgh, Pennsylvania 15244-0746

               if to Centana Gathering Company, to:
                      Attn: Vice President - Offshore
                      5718 Westheimer, Suite 2000
                      Houston, Texas 77057

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<PAGE>

               if to Coastal Dauphin Island Company, L.L.C., to:
                      Attn: Vice President - Gulf Coast
                      Coastal Tower
                      Nine Greenway Plaza
                      Houston, Texas 77046-0995

               if to Dauphin Island Gathering Company, L.P., to:
                      Attn: Mr. Keith Anderson
                      1400 Woodloch Forest Drive, Suite 200
                      The Woodlands, Texas 77380

               if to the Partnership, to Dauphin Island Gathering Company, L.P.,
               as Managing Partner
                      Attn: Mr. Keith Anderson
                      1400 Woodloch Forest Drive, Suite 200
                      The Woodlands, Texas 77380


A copy of all notices given to a Partner, the Managing Partner or the Finance
Partner shall also be given to the Partnership at its address as set by the
Management Committee from time to time.

        15.5 CONFIDENTIALITY. The Partners (including Withdrawing Partners)
shall ensure that any information regarding the business, assets, customers,
processes and methods of the Partnership or the other Partners that it may learn
in the course of negotiations for or performance under this Agreement (a) is
treated by it in strict confidence, (b) is not disclosed in any manner to any
Person other than an Affiliate of a Partner, a lender to or an accountant,
attorney or representative of such Partner or Affiliate who needs to know such
information, or as may be required by law or for tax purposes, and (c) is not
used by such Partner or any of its Affiliates for any purpose other than for the
exclusive benefit of the Partnership or to comply with law, tax purposes or
legal process. In addition, such information may, however, be disclosed by a
Partner to a person only if and to the extent that such information (a) is known
to such person prior to learning of it from the Partner; (b) is obtained,
whether directly or indirectly, by such person from a source other than such
Partner (or any of its Affiliates) that (1) did not require such person to hold
such secrets or information in confidence and (2) did not limit or restrict such
person's use thereof, (c) is disclosed for legal, regulatory or tax purposes; or
(d) becomes public knowledge otherwise than through the Partner (or any of its
Affiliates) seeking to use or disclose such information. Notwithstanding the
foregoing, (1) no Partner shall disclose any information if such disclosure
would cause a breach of, or violate the terms of, any gathering agreement to
which the Partnership is subject and (2) no Partner shall disclose to its

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Affiliates any information related to scheduling and nominations of gas gathered
by the Partnership.

        A disclosure by a Partner to its employee who is also an employee of an
Affiliate of such Partner or who performs services for an Affiliate of such
Partner shall not violate the provisions of this SECTION 15.5, provided the
information so disclosed is not used for any purpose other than the exclusive
benefit of the Partnership, or to comply with tax purposes or legal process.

        15.6 INURING CLAUSE. This Agreement shall inure to the benefit of and be
binding upon the parties and their respective successors and assigns.

        15.7 DEFAULT. No waiver of any default shall be construed as a waiver of
any future default, whether of a like or of a different nature.

        15.8 PARTITION OF PARTNERSHIP. Each Partner hereby expressly waives any
right to bring any action for an involuntary partition of the Partnership or its
assets.

        15.9 TIME OF THE ESSENCE. Time is of the essence in the performance of
this Agreement.

        15.10 LIMITATION ON AUTHORITY. Neither the Managing Partner, the Finance
Partner nor any of the Partners shall have authority to take any action
inconsistent with the terms of this Agreement. Except as authorized by this
Agreement, no Partner shall act as the agent of the Partnership without express
written authorization to act as the agent with respect to the particular matter
involved. Such authorization shall be obtained from the Management Committee or,
to the extent authorized by this Agreement, from the Managing Partner.

        15.11 ARBITRATION.

               (a) On the request of any Partner, whether made before
        institution of any legal proceeding or no later than forty-five (45)
        days after service of legal proceedings on the Partner seeking
        arbitration, any action, dispute, claim or controversy of any kind now
        existing or hereafter arising between any of the parties hereto and
        pertaining to the interpretation of or breach of this Agreement (a
        "DISPUTE") shall be resolved by binding arbitration in accordance with
        the terms hereof. Any Partner may, by summary proceedings, bring an
        action in court to compel arbitration of any Dispute.

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<PAGE>

               (b) Any arbitration shall be administered by the American
        Arbitration Association (the "AAA") in accordance with the terms of this
        SECTION 15.11, the Commercial Arbitration Rules of the AAA, and, to the
        maximum extent applicable, the Federal Arbitration Act. Judgment on any
        award rendered by an arbitrator may be entered in any court having
        jurisdiction.

               (c) Any arbitration shall be conducted before one arbitrator. The
        arbitrator shall be an individual who is knowledgeable in the subject
        matter of the Dispute selected by agreement between the Partners. If the
        Partners cannot agree on an arbitrator within thirty (30) days after the
        request for an arbitration, then any Partner may request the AAA to
        select an arbitrator. The arbitrator may engage engineers, accountants
        or other consultants that the arbitrator deems necessary to render a
        conclusion in the arbitration proceeding.

               (d) To the maximum extent practicable, an arbitration proceeding
        hereunder shall be concluded within one hundred eighty (180) days of the
        filing of the Dispute with the AAA. Arbitration proceedings shall be
        conducted in Houston, Texas. Arbitrators shall be empowered to impose
        sanctions and to take such other actions as the arbitrators deem
        necessary to the same extent a judge could impose sanctions or take such
        other actions pursuant to the Federal Rules of Civil Procedure and
        applicable law. At the conclusion of any arbitration proceeding, the
        arbitrator shall make specific written findings of fact and conclusions
        of law. The arbitrator shall have the power to award recovery of all
        costs and fees to the prevailing Partners. Each Partner agrees to keep
        all Disputes and arbitration proceedings strictly confidential except
        for disclosure of information required by applicable law.

               (e) All fees of the arbitrator and any engineer, accountant or
        other consultant engaged by the arbitrator, shall be paid by the
        Partners according to their Ownership Interests unless otherwise awarded
        by the arbitrator.

        15.12 REPRESENTATION OF PARTNERS. Each Partner represents and warrants
to each other Partner and to the Partnership that:

               (a) In cases of a corporation, it is a corporation duly
        organized, validly existing and in good standing under the laws of its
        State of incorporation or in a case of a partnership, it is a
        partnership duly organized and validly existing under the laws of the
        State of its organization.

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<PAGE>

               (b) The execution and delivery of this Agreement have been, and
        the performance of this Agreement shall be, at the time required to be
        performed hereunder, duly and validly authorized by all requisite
        corporate or partnership action on its part.

               (c) It has full power and authority to carry on its business as
        presently conducted, to enter into this Agreement and to perform its
        obligations under this Agreement;

               (d) This Agreement has been duly executed and delivered on behalf
        of it and constitutes the legal, valid and binding obligation of such
        Partner enforceable in accordance with its terms except as
        enforceability may be limited by applicable bankruptcy, reorganization
        or moratorium statutes, or the similar laws affecting the rights of
        creditors, generally, or equitable principles.

               (e) The execution and delivery of this Agreement by such Partner
        does not, and its performance of this Agreement, and ownership of its
        Ownership Interest shall not, (1) violate or be in conflict with, or
        require the consent of any person or entity under, any provision of such
        Partner's governing documents, (2) conflict with, result in a breach of,
        or constitute a default (or an event that with a lapse of time or
        notice, or both, would constitute a default) under any agreement or
        instrument to which such Partner is a party or is bound or otherwise
        subject to; or (3) violate any provision of or require any consent,
        authorization or approval under any judgment, decree, judicial or
        administrative order, award, writ, injunction, statute, rule or
        regulation applicable to such Partner; and

               (f) That such Partner has not and shall not at any time disclose
        to the Partnership or the other Partners any information that such
        Partner is prohibited or restricted from disclosing.

        Each Partner shall be responsible for, shall pay on a current basis,
shall indemnify, save, hold harmless, discharge and release the Partnership and
the other Partners, their respective Affiliates and its and their respective
successors and permitted assigns, and all of their respective stockholders,
directors, officers, employees, agents and representatives (the "INDEMNIFIED
PARTIES") from and against any and all claims, demands, suits, actions,
proceedings, payments, charges, judgments, assessments, liabilities, damages,
penalties, fines or costs and expenses suffered, paid or incurred by the party
seeking indemnification, including any legal or other expenses reasonably
incurred in connection therewith, arising 

                                       69
<PAGE>

from, based upon, related to or associated with any breach of a representation
and/or warranty made by such Partner in SECTIONS 2.1 AND 15.12.

        15.13 SEVERABILITY. If and to the extent that any court or governmental
agency of competent jurisdiction holds any part or provision of this Agreement
to be invalid or unenforceable, the Partners shall agree upon an equitable
adjustment of the provisions of this Agreement with a view toward effecting its
purpose. Such holding shall in no way affect the validity or effectiveness of
the other provisions of this Agreement, which shall remain in full force and
effect.

        15.14 REMEDIES. Each right and remedy under this Agreement is cumulative
and in addition to other rights or remedies under this Agreement or any
applicable law.

        15.15 EXHIBITS. Each exhibit referred to in this Agreement is
incorporated in this Agreement by reference. All obligations of any Partner
under any such exhibit shall be considered to be obligations under this
Agreement.

        15.16 SPECIAL AND CONSEQUENTIAL DAMAGES. No party or any Affiliate
thereof shall be liable to any other party for any exemplary or punitive damages
or for loss of profits or consequential losses (other than such exemplary or
punitive damages or loss of profits or consequential losses for which such party
is liable to a Person not party (or an Affiliate of a party) to this Agreement)
arising in connection with the Gathering System or this Agreement, EVEN IF
CAUSED BY THE SOLE, JOINT, CONTRIBUTORY AND/OR COMPARATIVE NEGLIGENCE, STRICT
LIABILITY, AND/OR OTHER FAULT OF SUCH PARTY OR AFFILIATE.

        15.17 COUNTERPARTS. This Agreement may be executed in counterparts, each
of which shall be deemed an original, but all of which together shall constitute
but one and the same instrument.

        15.18 ENTIRE AGREEMENT. This Agreement, the Contribution Agreement and
the other documents contemplated hereunder constitute the full and complete
agreement of the parties hereto with respect to the subject matter hereof.

        15.19 AMENDMENT. This Agreement shall not be amended except by a writing
executed by all of the Partners.

                            [SIGNATURES ON NEXT PAGE]

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               IN WITNESS WHEREOF, the parties hereto have executed this
Agreement as of the day and year first written above.


                              MCNIC MOBILE BAY GATHERING COMPANY

                              By: /S/ JOSEPH L. ROBERTS
                                      Joseph L. Roberts, Vice President


                              DAUPHIN ISLAND GATHERING COMPANY, L.P.,
                              by its general partner, OEDC, INC.

                              By: /S/  DOUGLAS H. KIESEWETTTER
                                       Douglas H. Kiesewetter, Vice President


                              PANENERGY DAUPHIN ISLAND COMPANY

                              By: /S/ BRAD D. REESE
                                      Brad D. Reese, Vice President


                              CENTANA GATHERING COMPANY

                              By: /S/ BRAD D. REESE
                                      Brad D. Reese, Vice President


                              CNG MAIN PASS GAS GATHERING CORPORATION

                              By: /S/ JAMES D. KEIFFER
                                      James D. Keiffer, Vice President

                              COASTAL DAUPHIN ISLAND COMPANY, L.L.C.

                              By: /S/ STEVEN R. ANDERSON
                                      Steven R. Anderson, Vice President

                                 EXECUTION PAGE

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